Given:
TJ is thinking of a number which he calls n.
He finds 1/3 of the number and then subtracts 5.
To find:
The expression to represent tj's number.
Solution:
TJ is thinking of a number which is n.
\(\dfrac{1}{3}\) of the number n = \(\dfrac{1}{3}n\)
Then subtracts 5 = \(\dfrac{1}{3}n-5\)
Therefore, the expression to represent tj's number is \(\dfrac{1}{3}n-5\).
The expression to represent TJ's number is \(\rm \dfrac{1}{3}n - 3\) and this can be determined by using the arithmetic operations and the given data.
Given :
TJ is thinking of a number which he calls n. He finds 1/3 of the number and then subtracts 5.The following steps can be used in order to determine the expression to represent TJ's number:
Step 1 - According to the given data, the number TJ's thinking about is 'n'.
Step 2 - Now, TJ's find 1/3 of the number 'n'. That is:
\(\rm =\dfrac{1}{3}n\)
Step 3 - Now, he subtracts that number obtained in the above step by 3.
\(\rm =\dfrac{1}{3}n - 3\)
So, the expression to represent TJ's number is \(\rm \dfrac{1}{3}n - 3\).
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NRTW is a parallelogram whose diagonals intersect at point B. Some measurements are given. NW = 6x − 10. 5 BW = 6x − 7. 7 TB = 2x + 11. 6 TW = 6x + 16 WR = 221 What equation can be used to determine the value of x ?
Therefore , the solution of the given problem of parallelograms comes out to be x = -1.25.
What is parallelograms?
In Euclidean mathematics, a parallelogram is actually a simple hexagon with two distinct groups and equal distances. A specific kind of quadrilateral called a parallelogram is formed when both sets of sides equally share a horizontal path. Parallelograms come in four different varieties, three of which are mutually exclusive.
Here,
We know that NRTW's opposing sides are parallel and congruent because it is a parallelogram. As a result, we have:
=> NW = TR = 6x - 10.5
and
=> TW = RN = 6x plus 16
Additionally, since we are aware that a parallelogram's diagonals are bisectional, we have:
=> TB = BW + 5.7
=> TB = 6x - 7.7
Let's now construct an equation using the fact that the diagonals intersect at position B:
=>TB + BW = TW + RN
Inputting the numbers provided yields:
=> 6x - 7.7 + 5.7 = 6x + 16 + 6x - 10.5
When we simplify and find x, we obtain:
=> 6x - 2 = 12x + 5.5
=> -6x = 7.5
=> x = -1.25
However, the problem does not make logic given that this value of x is negative.
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22. Evaluate the expression 1x2 + 2x +1 when
x = -5.
What is the square root of 89
Answer:
9.43398113206...
Step-by-step explanation:
Answer:
9.4
Step-by-step explanation:
√89 = 9.433981132
rounded - 9.4
What is the domain to this graph
Answer:
x > 0
Step-by-step explanation:
The domain of the graph are all the possible values of x. Since the graph never touches the negative part of the graph, x will always be greater than 0. Thus, x > 0 meaning x will be greater (not equal to) 0.
the results from a statistics class' first exam are as follows: the mean grade obtained by its 25 students is 83, with a standard deviation of 11. the grades were normally distributed. what grade is required to be in the top 40%?
A grade of 85.75 or higher is required to be in the top 40% of the class.
Describe Standard Deviation?Standard deviation is a statistical measure that represents the amount of variability or dispersion in a set of data values. It measures the degree of spread of the data values from the mean (average) of the data set.
To calculate the standard deviation of a data set, you first need to calculate the mean of the data set. Then, for each data point in the set, you calculate the difference between the data point and the mean. These differences are squared and then summed together. Finally, the sum is divided by the total number of data points minus one, and the square root of this value is taken to obtain the standard deviation.
To find the grade required to be in the top 40%, we need to find the z-score corresponding to the 60th percentile (100% - 40% = 60%).
We can use the standard normal distribution, where the mean (μ) is 0 and the standard deviation (σ) is 1, to find the z-score.
The formula for the z-score is:
z = (x - μ) / σ
where x is the value we want to find the z-score for.
To find x, we can rearrange the formula as:
x = μ + z * σ
where μ = 83 and σ = 11 (given in the problem statement).
To find the z-score for the 60th percentile, we can use a standard normal distribution table or a calculator that has a normal distribution function. Using a standard normal distribution table, we find that the z-score corresponding to the 60th percentile is approximately 0.25.
Plugging in the values, we get:
x = 83 + 0.25 * 11
x = 85.75
Therefore, a grade of 85.75 or higher is required to be in the top 40% of the class.
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even integers from 11 and 111
Answer:
Please see below :)
Step-by-step explanation:
Integers - Whole numbers (no fractions or decimals!)
11 to 111
12, 14, 16, 18, 20
22, 24, 26, 28, 30
32, 34, 36, 38, 40
42, 44, 46, 48, 50
52, 54, 56, 58, 60
62, 64, 66, 68, 70
72, 74, 76, 78, 80
82, 84, 86, 88, 90
92, 94, 96, 98, 100
102, 104, 106, 108, 110
Hope this helped!
Present the vector [ 1, 2, -5 ] as linear combination of vectors: [1, 0,-2], [0, 1, 3 ], [- 1, 3, 2].
[1, 2, -5] can be represented as linear combination of the vectors [1, 0,-2], [0, 1, 3], and [- 1, 3, 2] in the form 0[ 1, 0,-2 ] + 0[ 0, 1, 3 ] + 0[ -1, 3, 2 ].
The given vectors are: [ 1, 2, -5 ], [ 1, 0, -2 ], [ 0, 1, 3 ] and [ -1, 3, 2 ].
In order to present the vector [ 1, 2, -5 ] as linear combination of vectors [1, 0,-2], [0, 1, 3 ], [- 1, 3, 2], we can use the Gaussian elimination method.
Step 1: Write the augmented matrix[ 1, 2, -5 | 0 ][ 1, 0, -2 | 0 ][ 0, 1, 3 | 0 ][ -1, 3, 2 | 0 ]
Step 2: R2 ← R2 - R1, R4 ← R4 + R1[ 1, 2, -5 | 0 ][ 0, -2, 3 | 0 ][ 0, 1, 3 | 0 ][ 0, 5, -3 | 0 ]
Step 3: R1 ← R1 + R2[ 1, 0, -2 | 0 ][ 0, -2, 3 | 0 ][ 0, 1, 3 | 0 ][ 0, 5, -3 | 0 ]
Step 4: R2 ← - 1/2 R2[ 1, 0, -2 | 0 ][ 0, 1, -3/2 | 0 ][ 0, 1, 3 | 0 ][ 0, 5, -3 | 0 ]
Step 5: R3 ← R3 - R2[ 1, 0, -2 | 0 ][ 0, 1, -3/2 | 0 ][ 0, 0, 9/2 | 0 ][ 0, 5, -3 | 0 ]
Step 6: R4 ← R4 - 5R2[ 1, 0, -2 | 0 ][ 0, 1, -3/2 | 0 ][ 0, 0, 9/2 | 0 ][ 0, 0, 27/2 | 0 ]
Step 7: R4 ← 2/27 R4[ 1, 0, -2 | 0 ][ 0, 1, -3/2 | 0 ][ 0, 0, 9/2 | 0 ][ 0, 0, 1 | 0 ]
Step 8: R3 ← 2/9 R3[ 1, 0, -2 | 0 ][ 0, 1, -3/2 | 0 ][ 0, 0, 1 | 0 ][ 0, 0, 1 | 0 ]
Step 9: R1 ← R1 + 2R3, R2 ← R2 + 3/2 R3[ 1, 0, 0 | 0 ][ 0, 1, 0 | 0 ][ 0, 0, 1 | 0 ][ 0, 0, 1 | 0 ]
Step 10: R4 ← R4 - R3[ 1, 0, 0 | 0 ][ 0, 1, 0 | 0 ][ 0, 0, 1 | 0 ][ 0, 0, 0 | 0 ]
Therefore, the reduced row echelon form of the augmented matrix is given as [ 1, 0, 0 | 0 ][ 0, 1, 0 | 0 ][ 0, 0, 1 | 0 ][ 0, 0, 0 | 0 ].Now, we can express the vector [ 1, 2, -5 ] as a linear combination of the vectors [ 1, 0, -2 ], [ 0, 1, 3 ], and [ -1, 3, 2 ] as follows:[ 1, 2, -5 ] = 0 * [ 1, 0, -2 ] + 0 * [ 0, 1, 3 ] + 0 * [ -1, 3, 2 ]
So, [1, 2, -5] can be represented as linear combination of the vectors [1, 0,-2], [0, 1, 3], and [- 1, 3, 2] in the form 0[ 1, 0,-2 ] + 0[ 0, 1, 3 ] + 0[ -1, 3, 2 ].
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If the curveCis the top semicirclex 2+y 2=9from(3,0)to(−3,0), evaluate the line integral∫ C(y−x)ds. (enter an integer or a fraction) Question 3 Calculate the work done by the force fieldF=⟨−x,y,z⟩along the pathr(t)=⟨cost,sint,4t⟩,0≤t≤ 2π4π 22π 2+14π 2+12π 24π
With the help of integrals, ∫Cxy4ds, C it the right half of the circle x2+y2=16.
What are integrals?Finding a function's anti-derivatives is made easier with the aid of integral calculus. The function's integrals are another name for these anti-derivatives.
Integration is the process of identifying a function's anti-derivative. Finding the integrals is the opposite of finding the derivatives. A family of curves is represented by a function's integral.
Integration is the process of obtaining f(x) from f'(x). When all the little data are combined, problems with displacement and motion, area and volume, and other issues develop.
Integrals assign numbers to functions in a way that describes these issues. We can determine the function f given the derivative f' of the function f. Here, the function f is referred to as integral of f' or antiderivative of f.
According to our question-
∫Cxy4ds, C it the right half of the circle x2+y2=16.
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Solve this system of equations by using
the elimination method.
-x + 5y = 29
X - 2y = -8
After combining these equations, which
variable will be eliminated?
X or Y
The solution of the equations -x + 5y = 29 and x - 2y = -8 will be (6, 7).
What is the solution to the equation?The allocation of weights to the important variables that produce the calculation's optimum is referred to as a direct consequence.
The system of equations is given below.
-x + 5y = 29 ...1
x - 2y = - 8 ...2
Add equation 1 with equation 2, then the value of the variable 'y' is calculated as,
- x + x + 5y - 2y = 29 - 8
3y = 21
y = 21/3
y = 7
Then the value of the variable 'x' is calculated as,
x - 2(7) = -8
x - 14 = -8
x = 14 - 8
x = 6
The solution of the equations -x + 5y = 29 and x - 2y = -8 will be (6, 7).
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TRUE/FALSE. In the case when ø21 and ø22 are unknown and can be assumed equal, we can calculate a pooled estimate of the population variance.
In the case when ø21 and ø22 are unknown and can be assumed equal, we can calculate a pooled estimate of the population variance. This statement is True.
In the case where ø21 and ø22 are unknown and can be assumed equal, it is possible to calculate a pooled estimate of the population variance. This pooled estimate combines the sample variances from two groups or populations to obtain a more accurate estimate of the common variance. It assumes that the underlying variances in both groups are equal.
The pooled estimate of the population variance is calculated by taking a weighted average of the individual sample variances, with the weights determined by the sample sizes of the two groups. This pooled estimate is useful in various statistical analyses, such as t-tests or analysis of variance (ANOVA), where the assumption of equal variances is necessary.
However, it is important to note that the assumption of equal variances should be validated or tested before using the pooled estimate. If there is evidence to suggest unequal variances, alternative methods or adjustments may be necessary.
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The sum of three numbers is 33. The second number is 7 less than the first, and the third is two more than the second. Find the numbers
Answer:
First number: 15
Second number: 8
Third number: 10
Step-by-step explanation:
The equation is 33 = x + (x - 7) + (x - 7 + 2) . Remove the parenthesis and combine the like terms. 33 = 3x -12Add 12 on both sides. 45 = 3xDivide by 3 on both sides. x = 15What value of this expression? Select all that apply.
(8.59 x 10^4) - (3.2 x 10^3)
A. 8.27 x 10^4
B. 5.39 x 10^1
C. 2.7488 x 10^7
D. 82,700
Answer:
Use the given functions to set up and simplify
700
.
(
8.59
x
⋅
10
4
)
−
(
3.2
x
⋅
10
3
)
=
82700
x
A
=
82700
x
8.27
x
⋅
10
4
=
82700
x
B
=
82700
x
5.39
x
⋅
10
1
=
53.9
x
C
=
53.9
x
2.7488
x
⋅
10
7
=
27488000
x
D
=
27488000
x
82
=
27488000
x
700
=
27488000
x
Step-by-step explanation:
i hope this helped
Which of the following is best described using the notation (x, y, z)?
A. A line in the two-dimensional coordinate plane
B. A point in the two-dimensional coordinate plane
C. A line segment in the two-dimensional coordinate plane
D. A point in the three-dimensional coordinate plane
Answer:
D;
Step-by-step explanation:
In the Cartesian system and coordinates, we have the 2 dimensional plane and also the 3 dimensional plane.
The two dimensional plane is the more popular one within this level of education where we have one of the coordinates denoting the horizontal distance with the other coordinate denoting the vertical distance.
The one that denotes the horizontal distance is referred to as the x-coordinate with its plane called the x-axis while the one they represents the vertical distance is referred to the y-coordinate and its plane is called the y-axis
In the three dimensional space however, we have the third side which is the z part and it’s called the z-coordinate which is for the z axis
Answer:
d
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How many inch in 10 cm?
Answer: 3.93701
Step-by-step explanation:
Answer:
10 cm to inches is 3 15/16 inches, or in decimal, is 3.9370 inches
Step-by-step explanation:
h-4/j = k for j solve for the indicated variable
Answer:
j = -4/(k - h)
Step-by-step explanation:
h - 4/j = k
use inverse operation
h - 4/j = k
-h -h
-4/j = k - h
*j *j
-4 = j( k - h )
/( k - h ) /( k - h )
-4/( k - h ) = j
Triangle BCD, with vertices B(4,-7), C(6,-8), and D(7,-2), is drawn on the coordinate
grid below.
S
Answer: A =
6
7
D
9
What is the area, in square units, of triangle BCD?
units
Submit Answer
K
Answer: The area is 6.5
The patient's recovery time from a particular surgical procedure is normally distributed with a mean of 7 days and a standard deviation of 7.92 days. What is the probability that it will take more than 11 day to a randomly selected patient to recover from the surgical procedure? QUestion 7 The patient's recovery time from a particular surgical procedure is normally distributed with a mean of 20 days and a standard deviation of 2.24 days. Let X - is the number of days a randomly selected patient needs to recover from the surgical procedure. What is the upper bound of the 90% confidence interval of X ? QUESTION 8 The time needed to find a parking space is normally distributed with a mean of 15 minutes and a standard deviation of 4.89 minutes. 90% of the time, it takes more than how many minutes to find a parking space?
The upper bound of the 90% confidence interval for the recovery time is approximately 23.696 days.
It takes more than approximately 21.257 minutes to find a parking space 90% of the time.
To find the probability that it will take more than 11 days to recover from the surgical procedure, we need to calculate the area under the normal distribution curve to the right of 11 days.
Mean (μ) = 7 days
Standard deviation (σ) = 7.92 days
We can standardize the value of 11 days using the z-score formula:
z = (x - μ) / σ
z = (11 - 7) / 7.92
z = 0.506
Using a standard normal distribution table or a calculator, we can find the probability corresponding to the z-score of 0.506. The probability is approximately 0.3051.
Therefore, the probability that it will take more than 11 days to recover is approximately 0.3051 or 30.51%.
Question 8:
To find the upper bound of the 90% confidence interval for the number of days needed to recover from the surgical procedure, we need to calculate the z-score corresponding to the desired confidence level and then find the corresponding value using the standard deviation.
Given:
Mean (μ) = 20 days
Standard deviation (σ) = 2.24 days
For a 90% confidence interval, the z-score corresponding to the upper tail probability of 0.10 (1 - 0.90) is approximately 1.645.
Using the formula for the upper bound of the confidence interval:
Upper bound = μ + (z * σ)
Upper bound = 20 + (1.645 * 2.24)
Upper bound ≈ 23.696
Therefore, the upper bound of the 90% confidence interval for the recovery time is approximately 23.696 days.
Question 9:
To find the time it takes more than 90% of the time to find a parking space, we need to calculate the z-score corresponding to the desired upper tail probability and then find the corresponding value using the standard deviation.
Mean (μ) = 15 minutes
Standard deviation (σ) = 4.89 minutes
For a probability of 90%, the upper tail probability is 1 - 0.90 = 0.10.
Using a standard normal distribution table or a calculator, we can find the z-score corresponding to the upper tail probability of 0.10, which is approximately 1.282.
Using the formula for the upper bound:
Upper bound = μ + (z * σ)
Upper bound = 15 + (1.282 * 4.89)
Upper bound ≈ 21.257
Therefore, it takes more than approximately 21.257 minutes to find a parking space 90% of the time.
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6.1.11 suppose we have a statistical model {fθ : θ ∈ [0, 1]} and we observe x0. is it true that 8 1 0 l(θ | x0) dθ = 1? explain why or why not.
No, it is not true that ∫_0^1 l(θ | x0) dθ = 1. The integral of the likelihood function l(θ | x0) over the parameter space [0, 1] does not necessarily equal 1.
The likelihood function l(θ | x0) measures the probability of observing the data x0 given the parameter value θ. It is a function of the parameter θ, and not a probability distribution over θ.
Therefore, the integral of the likelihood function over the parameter space does not have to equal 1, unlike the integral of a probability density function over its support.
In fact, the integral of the likelihood function over the parameter space is often referred to as the marginal likelihood or the evidence, and is used in Bayesian inference to compute the posterior distribution of the parameter θ given the data x0. The marginal likelihood is given by: ∫_0^1 l(θ | x0) p(θ) dθ
where p(θ) is the prior distribution of the parameter θ. The marginal likelihood is used to normalize the posterior distribution so that it integrates to 1:
p(θ | x0) = l(θ | x0) p(θ) / ∫_0^1 l(θ | x0) p(θ) dθ
In conclusion, the integral of the likelihood function over the parameter space does not necessarily equal 1, and is used in Bayesian inference to compute the posterior distribution of the parameter θ given the data x0.
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You are considering purchasing a consol that promises annual payments of $4. a. If the current interest rate is 3 percent, what is the price of the consol? Instructions: Round your answer to the nearest penny (2 decimal places). The price of the consol is $ b. You are concerned that the interest rate may rise to 4 percent. Compute the percentage change in the price of the consol and the percentage change in the interest rate. Compare them. Instructions: Round your answer for dollar amounts to the nearest penny (2 decimal places ) and answers for percentages to the nearest tenth (1 decimal place) The new price of the consol would be $ The price of the consol falls by 7% and the interest rises by 7% c. Your investment horizon is one year. You purchase the consol when the interest rate is 5 percent and sell it a year later, following a rise in the interest rate to 6 percent. What is your holding period return? Instructions: Round your answer to the nearest tenth (1 decimal place) Your holding period return is %
a. The price of the consol is approximately $133.33.
b. The new price of the consol would be $100. The price of the consol falls by 24.99% and the interest rate rises by 1%.
c. Your holding period return is approximately -49.99%.
a. The price of the consol can be calculated using the formula for the present value of a perpetuity:
Price = Annual Payment / Interest Rate
In this case, the annual payment is $4 and the interest rate is 3%. Substituting these values into the formula:
Price = $4 / 0.03 ≈ $133.33
Therefore, the price of the consol is approximately $133.33.
b. To calculate the new price of the consol if the interest rate rises to 4%, we use the same formula:
New Price = Annual Payment / New Interest Rate
Substituting the values, we get:
New Price = $4 / 0.04 = $100
The percentage change in the price of the consol can be calculated using the formula:
Percentage Change = (New Price - Old Price) / Old Price * 100
Substituting the values, we have:
Percentage Change in Price = ($100 - $133.33) / $133.33 * 100 ≈ -24.99%
The percentage change in the interest rate is simply the difference between the old and new interest rates:
Percentage Change in Interest Rate = (4% - 3%) = 1%
Comparing the two percentages, we can see that the price of the consol falls by approximately 24.99%, while the interest rate rises by 1%.
c. The holding period return can be calculated using the formula:
Holding Period Return = (Ending Value - Initial Value) / Initial Value * 100
The initial value is the purchase price of the consol, which is $133.33, and the ending value is the price of the consol after one year with an interest rate of 6%. Using the formula for the present value of a perpetuity, we can calculate the ending value:
Ending Value = Annual Payment / Interest Rate = $4 / 0.06 = $66.67
Substituting the values into the holding period return formula:
Holding Period Return = ($66.67 - $133.33) / $133.33 * 100 ≈ -49.99%
Therefore, the holding period return is approximately -49.99%.
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alexa is using 6 pounds of apples to make pies.
how many ounces of apples is alexa using?
(1 pound=16 ounces)
Answer:
\(1pound = 16ounces \\ 6pound = {x} \\ x = 96ounces\)
HELPP Sandy used a virtual coin toss app to show the results of flipping a coin 100 times, 500 times, and 1,000 times. Explain what most likely happened in Sandy's experiment.
Sandy's experimental probability was closest to the theoretical probability in the experiment with 100 flips.
Sandy's experimental probability was closest to the theoretical probability in the experiment with 500 flips.
Sandy's experimental probability was closest to the theoretical probability in the experiment with 1,000 flips.
Sandy's experimental probability was exactly the same as the theoretical probability for all three experiments.
Answer:
Sandy's experimental probability was exactly the same as the theoretical probability for all three experiments.
determine the sum of the following series. ∑n=1[infinity](sin(4n)−sin(4n 1)) ∑n=1[infinity](sin(4n)−sin(4n 1))
In this case, sin(4) and -sin(5) cancel out, sin(8) and -sin(9) cancel out, and so on. Since each pair of terms cancel out, the sum of the series converges to 0.
We want to determine the sum of the series:
\(\sum(_{n=1} ^\ infinity)}(sin(4n) - sin(4n+1))\)
Notice that for each term in the series, we have sin(4n) - sin(4n+1). To find the sum, we can examine the first few terms of the series:
\(Term1: sin(4) - sin(5)\\Term2: sin(8) - sin(9)\\Term3: sin(12) - sin(13)...\)
Now, observe that the series consists of alternating positive and negative sine values, creating a telescoping series. In a telescoping series, the terms cancel each other out, leaving only a finite number of terms remaining.
In this case, sin(4) and -sin(5) cancel out, sin(8) and -sin(9) cancel out, and so on. Since each pair of terms cancel out, the sum of the series converges to 0.
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5 In a game that you are playing, your friend says that she has -6 points "give or take" 4 points. You currently have -3 points in the game. Can you say who is winning? Why or why not? Use a number line to explain.
Based on the information provided, it's not possible to say who is winning without knowing the specific game and how points are scored and awarded.
How to explain the informationThe statement "has -6 points give or take 4 points" doesn't provide a specific range of points that your friend could have, so we can't use this information to determine a winner.
Additionally, using a number line to compare two points of -3 and -6 is not helpful in determining who is winning in the game because it only shows their relative values, not the actual rules of the game and how points are scored.
It would be best to ask the friend to clarify their score and the rules of the game to determine who is winning.
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FREE BRAINLIEST! if you can answer this correctly ill give you brainliest and answer some of the questions you have posted :) thank you very much!!! (22pts)
Answer:
14
Step-by-step explanation:
Factor 26r³s
O 13(2r³s + 475-37²54)
037²s(27+ 47³-38³)
O 13r²(2rs + 4r3 – 384)
O 13r²(26r³s + 527-5-39²4)
+5275-39724. What is the resulting expression?
The resulting expression of the algebraic expression is 13r²(2rs + 4r³ - 3s⁴).
option C.
What is the resulting expression of the algebraic expression?The resulting expression of the algebraic expression given as
26r³s + 52r^(5) - 39r²s⁴
can be determined by finding the highest common factor here and factorize out.
The highest common factor of the letters is r²
Factors of 26 = 1, 2, 13, 26
Factors of 39 = 1, 3, 13, 39
Factors of 52 = 1, 2, 4, 13, 26, 52
The highest common factor for the 3 numbers is 13.
Thus, in total, the highest common factor for the algebraic expression is 13r².
Finally, we have;
13r²(2rs + 4r³ - 3s⁴)
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The complete question is below:
Factor 26r³s + 52r^(5) - 39r²s⁴
Help ASAP!!
A. You have everything you need to write your modeling equation! Using the information about amplitude(-60), vertical shift(70), horizontal shift(0), and period(pi/30), write an equation for your modeling function.
B. Antoine and Adriane both want to know how long it will take to reach an elevation of 100 feet above the ground. Use your function to determine how long it will take for your Ferris wheel rider to reach that elevation
The equation of the function is y = 60sin(1/15t) + 70 and it will take 92.45 unit of time to reach 100 feet above the ground
The equation of the functionThe given parameters are:
Amplitude, A = 60 (amplitude is always positive)Vertical shift, D = 70 Horizontal shift, C = 0Period, T = π/30The function is represented as:
y = Asin(Bt + C) + D
Where:
B = 2π/T
So, we have:
B = 2π/π/30
Evaluate
B = 1/15
The equation becomes
y = 60sin(1/15t + 0) + 70
This gives
y = 60sin(1/15t) + 70
The time to reach 100 feet above the groundThis means that:
t = 100
So, we have:
y = 60sin(1/15* 100) + 70
Evaluate
y = 92.45
Hence, it will take 92.45 unit of time to reach 100 feet above the ground
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Christine has $90 in a savings account. The interest rate is 5%, compounded annually.
To the nearest cent, how much interest will she earn in 3 years?
Answer: $13.5
Step-by-step explanation:
90 x 5% = 4.5 x 3 = 13.5
I really need help with this it’s due tonight
e) (2 + 4i). (9 -- 3i)
Answer:
\((2 + 4i)(9 - 3i) \in \C \\ = 18 - 6i + 36i + 12 \\ = 30 + 30i \\ = 30(1 + i)\)
Relative to the origin O, the position vectors of two points A and B are a and b respectively. b is a unit vector and the magnitude of a is twice that of b. The angle between a and b is 60°. Show that [a×[ob + (1-o)a] =√k, where k is a constant to be determined.
Using cross product, the vector can be proven as [a×[ob + (1-o)a] = √k is shown to be true, where k = 3 (2 - O)^2 (a · b)^6 / 4.
What is the proof that [a * [ob + (1 - o)a] = √kThe vector OB can be expressed as OB = b since b is a unit vector and O is the origin.
The vector OA can be expressed as OA = 2b since the magnitude of a is twice that of b.
The angle between a and b is 60°, so we have:
|a| |b| cos 60° = a · b
2|b| · 1/2 = a · b
|b| = a · b
We can now express the vector [OB + (1 - O)A] as:
[OB + (1 - O)A] = b + (1 - O)2b
= (2 - O) b
The cross product of a and [OB + (1 - O)A] is:
a × [OB + (1 - O)A] = a × [(2 - O) b]
= (2 - O) (a × b)
The magnitude of the cross product is:
|a × [OB + (1 - O)A]| = |(2 - O) (a × b)|
= |2 - O| |a| |b| sin 60°
= √3 |2 - O| |b| |a| / 2
= √3 |2 - O| |b|^2 |b| / 2
= √3 |2 - O| |b|^3 / 2
Substituting |b| = a · b, we get:
|a × [OB + (1 - O)A]| = √3 |2 - O| (a · b)^3 / 2
Since |a × [OB + (1 - O)A]| is equal to √k for some constant k, we can set:
√k = √3 |2 - O| (a · b)^3 / 2
Squaring both sides, we get:
k = 3 (2 - O)^2 (a · b)^6 / 4
Therefore, [a×[ob + (1-o)a] = √k is shown to be true, where k = 3 (2 - O)^2 (a · b)^6 / 4.
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