The expression for the area of the rectangle inscribed in a circle of radius 9, in terms of n, is:
Area = n * √(81 - n^2)
To find an expression for the area of a rectangle inscribed in a circle of radius 9, we need to use the terms "rectangle" and "circle."
First, let's denote the length of the rectangle as "n" and the width as "w." Since the rectangle is inscribed in a circle with a radius of 9, its diagonal is equal to the diameter of the circle, which is 2 * 9 = 18.
Using the Pythagorean theorem for the right triangle formed by half of the diagonal, the length, and the width, we can write the equation:
(1/2 * 18)^2 = n^2 + w^2
81 = n^2 + w^2
Now, we need to express w in terms of n. To do this, we'll isolate w from the equation:
w^2 = 81 - n^2
w = √(81 - n^2)
The area of the rectangle can be calculated as the product of its length and width:
Area = n * w
Area = n * √(81 - n^2)
So, the expression for the area of the rectangle inscribed in a circle of radius 9, in terms of n, is:
Area = n * √(81 - n^2)
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You rent an apartment that costs $1800 per month during the first year, but the rent
is set to go up $130 per year. What would be the monthly rent during the 8th year of
living in the apartment?
Answer:
2710 is the answer
Step-by-step explanation:
1800+130(7)
I need help again sorry pls I’ll wait this time Bc I pressed similar question help me pls for 100 pts
Answer:
can u add the question so we can help?
Step-by-step explanation:
The position of an object at time t is given by s(t) = -8 - 9t. Find the instantaneous velocity at t = 1 by finding the derivative. plz show work
Answer:
The instantaneous velocity at t = 1 will be:
\(\frac{d}{dt}\left(-8-9t\right)=-9\)Step-by-step explanation:
Given the position of an object at a time \(t\)
\(s\left(t\right)=-8-9t\)
As we know that determining the derivative of the position function with respect to time t would give us the instantaneous velocity, so
\(\frac{ds}{dt}=\frac{d}{dt}\left(-8-9t\right)\)
Applying the sum/difference rule:
\(\left(f\pm g\right)'=f\:'\pm g'\)
\(\frac{ds}{dt}=-\frac{d}{dt}\left(8\right)-\frac{d}{dt}\left(9t\right)\)
as
\(\frac{d}{dt}\left(8\right)=0\) ∵ \(\frac{d}{dx}\left(a\right)=0\)
and
\(\frac{d}{dt}\left(9t\right)=9\) ∵ \(\mathrm{Take\:the\:constant\:out}:\quad \left(a\cdot f\right)'=a\cdot f\:'\) and \(\frac{d}{dt}\left(t\right)=1\)
so the expression becomes
\(\frac{ds}{dt}=-\frac{d}{dt}\left(8\right)-\frac{d}{dt}\left(9t\right)\)
\(=-0-9\)
\(=-9\)
As the derivative is constant.
Therefore, the instantaneous velocity at t = 1 will be:
\(\frac{d}{dt}\left(-8-9t\right)=-9\)
I will give braniest An orange has a diameter of 3 in. and a grapefruit has a diameter of 4 in. What is the approximate difference in the volume of the two fruits?
A.
5 in.3
B.
7 in.3
C.
19 in.3
D.
29 in.3
7 in.3 hope it helps
Apples are $1.79 per lb at Food Lion. If I purchase 3.8 lbs, how much sure I expect to pay?
Answer:
$6.80
Step-by-step explanation:
1.79 x 3.8 = 6.802
So $6.80
Identify the surface area of the prism formed by the net.
16 ft
5 ft
5 ft
16 ft
5 ft
9 ft
16 ft
The surface area of the prism formed by the net is 538 square feet².
How to calculate the surface area?The area occupied by the surfaces of an object is called its surface area. In geometry, different 3D shapes have different surface areas which can be easily calculated using the formula:
\(\boxed{\bold{\sf SA= 2 \times(lw + wh + lh)}}\)
Let,
5 be the length9 be the widthAnd 16 be the heightSo,
\(\sf SA= 2\times(45+80+144)\)
\(\sf SA =2\times269\)
\(\sf SA =\bold{538 \ square \ feet^2}\)
Thus, the surface area of the prism formed by the net is 538 square feet².
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A cylinder has a height of 20 ft and a volume of 64,339 ft³.
What is the radius of the cylinder?
Round your answer to the nearest whole number.
676 ft
338 ft
32 ft
26 ft
Answer:
64,339 = π(r^2)(20)
r^2 = 1,023.987
r = 32 ft
what is the degree of -5a2b+4a2-2b+5
The overall degree of the expression is determined by the term with the highest degree, which in this case is 3.
The degree of a term in an algebraic expression is determined by the sum of the exponents of the variables in that term. In the expression -5a^2b + 4a^2 - 2b + 5, the highest exponent of the variable 'a' is 2, and the highest exponent of the variable 'b' is 1 (since 'b' appears by itself without an exponent, we can consider it as having an exponent of 1).
Therefore, the degree of the term -5a^2b is 2 + 1 = 3.
The degree of the term 4a^2 is 2.
The degree of the term -2b is 1.
The degree of the term 5 (which is a constant) is 0.
So, the degree of the expression -5a^2b + 4a^2 - 2b + 5 is 3.
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A country has 10 billion dollars in paper currency in circulation, and each day 57 million dollars comes into the country's banks: The government decides to introduce new currency by having the banks replace old bills with new ones whenever old currency comes into the bank: Let x x(t) denote the number of new dollars in circulation after t days with units in billions and x(0) 0. A. Determine a differential equation which describes the rate at which x is growing: 4 B. Solve the differential equation subject to the initial conditions given above. x(t) C How many days will it take for the new bills to account for 90 percent of the currency in circulation?
The differential equation describing the rate at which x is growing is: dx/dt = 57 - kx, where k is a constant. The solution to the differential equation, subject to the initial condition x(0) = 0, is: x(t) = (57/k)(1 - e^(-kt)). To find the number of days it takes for the new bills to account for 90 percent of the currency in circulation, we need to solve for t in the equation 0.9 = x(t)/10.
A. The rate at which x is growing is given by the difference between the money coming into the banks (57 million dollars per day) and the rate at which old currency is being replaced (kx, where k is a constant representing the rate of replacement). Therefore, the differential equation is dx/dt = 57 - kx.
B. To solve the differential equation, we can separate variables and integrate both sides. This leads to the solution x(t) = (57/k)(1 - e^(-kt)). The constant k can be determined by considering the initial condition x(0) = 0.
C. To find the number of days it takes for the new bills to account for 90 percent of the currency in circulation, we substitute x(t)/10 = 0.9 into the solution obtained in part B. Solving for t, we can determine the number of days it will take for this condition to be met.
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7. A farmer wants to start raising cows, horses, goats, and sheep, and desires to have a rectangular pasture for the animals to graze in. However, no two different kinds of animals can graze together. In order to minimize the amount of fencing she will need, she has decided to enclose a large rectangular area and then divide it into four equally sized pens by adding three segments of fence inside the large rectangle that are parallel to two existing sides. She has decided to purchase 7500 ft of fencing. What is the maximum possible area that each of the four pens will enclose?
Having a rectangular pasture for the animals to graze in is something a farmer wants in order to start growing cows, horses, goats, and sheep. She has decided to purchase 7500 ft of fencing. 1875 square feet is the maximum possible area that each of the four pens will enclose.
The maximum possible area of each pen is 1875 square feet. To calculate this, first calculate the total area of the large rectangle that the farmer is enclosing. To do this, multiply the total length of the fencing (7500 feet) by the width of the fence (1 foot). This gives us 7500 square feet as the area of the large rectangle.
Next, divide the area of the large rectangle by 4 to get the area of each pen. This gives us 1875 square feet as the maximum area of each pen.
Total Area of Large Rectangle = 7500 ft x 1 ft = 7500 sq ft
Area of Each Pen = 7500 sq ft / 4 = 1875 sq ft
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Data were recorded for a car’s fuel efficiency, in miles per gallon (mpg), and corresponding speed, in miles per hour (mph). Given the least-squares regression line, , what is the predicted fuel efficiency for a speed of 30 mph?
17. 67 mpg
26. 50 mpg
30. 00 mpg
37. 74 mpg
The predicted fuel efficiency for a speed of 30 mph will be 26.50 mpg when the least-squares regression line is given.
What is the least-squares regression line?If the data demonstrates a stronger link between two variables, the line that best matches this linear relationship is known as a least-squares regression line, and it minimizes the vertical distance between the data points and the regression line. A regression line is a straight line that illustrates how a response variable y varies when an explanatory variable x changes. The line is a mathematical model that predicts the value of y given a value of x. A regression line predicts the value of y for a given value of x. A regression line is discovered through regression analysis. When the explanatory variable changes, the regression line shows how much and in which direction the response variable changes.
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The base of the triangular pyramid shown is an equilateral triangle vóth sides measuring 6 yards and a height of
5.2 yards. Each lateral face is congruent and has a height of 8 yards.
What is the surface area of the pyramid?
15.6 square yards
72 square yards
87.6 square yards
144 square yards
Answer:15.6
Step-by-step explanation:
Answer:
A
Step-by-step explanation:
The sides of a right-angled triangle are in the ratio 8:15:17. If the perimeter of the triangle is 160 cm, find the area.
How can you identify the leading coefficient and degree of a polynomial function?
The degree of the variable that appears in the polynomial has the most power. The leading term is the one with the highest degree or the one with the highest power of the variable. The coefficient of the leading term is the leading coefficient.
What is a polynomial function?In an equation such as the quadratic equation, cubic equation, etc., a polynomial function is a function that only uses non-negative integer powers or only positive integer exponents of a variable.
For instance, the polynomial 2x+5 has an exponent of 1.
A polynomial is not an expression with a variable that has fractional or negative exponents, divides by a variable, or is contained inside a radical.
The biggest power of the variable that occurs in the polynomial is its degree.
The term with the highest degree—i.e., the term with the largest power of the variable—is the leading term.
The leading coefficient is the leading term's coefficient.
Therefore, the degree of the variable that appears in the polynomial has the most power. The leading term is the one with the highest degree or the one with the highest power of the variable. The coefficient of the leading term is the leading coefficient.
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Find the slope of the line that passes through each pair of points C(2, 5), D(3, 1)
Answer:
-4
Step-by-step explanation:
the required slope can be calculated using the formula:
\(s=\frac{Y_C-Y_D}{X_C-X_D}=\frac{5-1}{2-3}=-4.\)
Anyone know the answer ?
Answer:
n = 7
Step-by-step explanation:
\(Area \: of \: \triangle = \frac{1}{2} \times base \times height \\ \\ 12 = \frac{1}{2} \times (n + 5) \times (n + 5 - 10) \\ \\ 12 \times 2 = (n + 5)(n - 5) \\ \\ 24 = {n}^{2} - {5}^{2} \\ \\ 24 = {n}^{2} - 25 \\ \\ 24 + 25 = {n}^{2} \\ \\ {n}^{2} = 49 \\ \\ n = \pm \: \sqrt{49} \\ \\ n = \pm \: 7 \\ \\ n = - 7 \: \: or \: \: n = 7 \\ \)
Answer:
n = -7 ∪ 7
=> n = |7|
Step-by-step explanation:
S = 12cm = (n + 5) * (n + 5 - 10) / 2
\(S = 12cm = \frac{(n + 5) * (n + 5 - 10)}{2}\\\\=> 12 = \frac{(n+5)(n-5)}{2} \\12 = \frac{n^2-25}{2} \\24 = n^2 - 25\\-n^2 = -25 - 24\\-n^2 = - 49\\n^2 = 49\\n = |7| =>\\ x_1 = -7\\x_2 = 7\\\)
in the expression 4/5 _ what number would result in a ratiuonal sum
The sum of the rational number 4/5 and its reciprocal is 41/20. The reciprocal of a number is obtained by interchanging the numerator and denominator.
In this case, the reciprocal of 4/5 would be 5/4. To find the sum of 4/5 with its reciprocal, we add the two fractions:
4/5 + 5/4
To add these fractions, we need to find a common denominator. The least common multiple (LCM) of 5 and 4 is 20. Therefore, we can rewrite the fractions with a common denominator:
(4/5)(4/4) + (5/4)(5/5)
Simplifying these fractions, we get:
16/20 + 25/20
Now that the fractions have the same denominator, we can combine the numerators:
(16 + 25)/20
This simplifies to:
41/20
So, the sum of the rational number 4/5 with its reciprocal is 41/20.
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The complete question is:
What is the sum of the rational number 4/5 and its reciprocal?
2x + 3 = x -4
what is the answer
Answer:
Step 1: Subtract x from both sides.
2x+3−x=x−4−x
x+3=−4
Step 2: Subtract 3 from both sides.
x+3−3=−4−3
x=−7
Answer:
x=−7
Please help. I'll give brainliest :)
A very exclusive college accepts approximately 2 students out of 5
applicants. Which of the following could describe this situation?
A. This year, the college accepted 2060 and did not accept 5150.
B. This year, the college accepted 3090 and did not accept 2060.
C. This year, the college accepted 2050 and did not accept 3075.
D. This year, the college accepted 2220 and did not accept 5550.
Answer:
Try "This year, the college accepted 2060 and did not accept 5150." because 5150/2060 is 2.5. It might be wrong but I do think that is the correct answer
Option C describes the situation.
Given in the question,
Ratio of the accepted students and the total students = \(\frac{2}{5}\) = 0.4 : 1Check each option for the ratio of the accepted and total number of students.
Option A.
\(\frac{\text{Accepted students}}{\text{Total students}}=\frac{2060}{5150+2060}\)
= 0.29 : 1
False.
Option B.
\(\frac{\text{Accepted students}}{\text{Total students}}=\frac{3090}{3090+2060}\)
= 0.6 : 1
False.
Option C.
\(\frac{\text{Accepted students}}{\text{Total students}}=\frac{2050}{2050+3075}\)
= 0.4 : 1
True.
Option D.
\(\frac{\text{Accepted students}}{\text{Total students}}=\frac{2220}{2220+5550}\)
= 0.29 : 1
False.
Therefore, Option C defines the situation.
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What is the distance from the center of the circle C to chord AB?
Answer:
Step-by-step explanation:
8.5
A line is drawn through points A and B on the coordinate plane shown below.
A line is drawn through points A and B on the coordinate plane shown below.
Which coordinates BEST represent the location of the x-intercept of the line?
A:(-2,0)
B:(0,-2)
C:(3,0)
D:(0,3)
sat scores are normally distributed and in the state of ohio in 2017, the mean was 1149 with a standard deviation of 212. to get accepted into yale, you need an sat of 1460 or an act of 33. which is your best option to get admitted to yale?
We cannot determine which of the two options is the best one to get admitted to Yale.
In 2017, the mean of SAT scores in Ohio was 1149 with a standard deviation of 212. To get admitted to Yale, you need to score 1460 in the SAT or 33 in the ACT. So which of the two options is the best one to get accepted to Yale?
Solution: Given that the mean SAT scores in Ohio in 2017 was 1149, with a standard deviation of 212. Therefore, the normal distribution of SAT scores can be written as N (1149, 212).To get accepted into Yale, you need an SAT score of 1460 or an ACT score of 33.Because SAT scores are normally distributed, we can find the probability of scoring 1460 or higher by converting this score to a z-score. Using the formula below;Z = (X - µ)/σwhere X = 1460, µ = 1149 and σ = 212Z = (1460 - 1149)/212Z = 1.47Using the normal distribution table, we can find that the probability of obtaining a z-score of 1.47 or more is approximately 0.429. Therefore, the probability of obtaining a score of 1460 or higher on the SAT is 0.429.However, if you take the ACT instead, you will need to score at least 33. Unfortunately, we don't have enough information to compare the probability of scoring 33 or higher on the ACT to the probability of scoring 1460 or higher on the SAT. Therefore, we cannot determine which of the two options is the best one to get admitted to Yale.
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The given mean and standard deviation can be used to calculate the z-score of a student's SAT score. The z-score will tell us how many standard deviations a student's score is above or below the mean. To find which test score (SAT or ACT) would give you a better chance of getting into Yale, we will need to convert the ACT score to an equivalent SAT score and then compare that to your SAT score converted to a z-score.
SAT scores are normally distributed in Ohio in 2017 with mean = 1149 and standard deviation = 212.To get accepted into Yale, you need an SAT score of 1460 or an ACT score of 33.Z-score of 1460 can be calculated as below:z = (x - μ) / σwhere x = 1460, μ = 1149 and σ = 212.z = (1460 - 1149) / 212z = 1.4747So, a student needs to score 1.4747 standard deviations above the mean to get into Yale.Using the standard normal distribution table, we can find that the probability of a randomly selected student scoring higher than 1.4747 standard deviations above the mean is approximately 7.6%.This means that if a student scores a 1460 on the SAT, they would be in the top 7.6% of all test-takers in Ohio in 2017.Now, we need to find the equivalent SAT score of an ACT score of 33. According to the College Board, the equivalent SAT score for an ACT score of 33 is 1460. So, if a student scores a 33 on the ACT, they would be in the top 1% of all test-takers, and this score would be equivalent to a 1460 on the SAT.Therefore, if a student can score a 33 on the ACT, they would have a better chance of getting into Yale than if they scored a 1460 on the SAT.
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Can the sides of a triangle have lengths 13, 1, and 1?
Answer:
no you cant
Step-by-step explanation:
Which statistical value describes how well a regression line fits the data points?.
The statistical value describes a regression line fits the data points:
R-squared
What is Statistical Value?
When it is extremely unlikely that an observed event occurred by accident, it is deemed statistically significant. An observed event is considered statistically significant when its p-value is less than a certain cutoff, or level of significance.
The statistical value describes a regression line fits the data points is
R-squared
The statistical indicator of how closely the data resemble the fitted regression line is called R-squared. For multiple regression, it is sometimes referred to as the coefficient of determination or the coefficient of multiple determination.
R-squared = Explained variation / Total variation
R-squared is always between 0 and 100%
The better the model matches your data, in general, the greater the R-squared.
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Find the volumes of the solids generated by revolving the region in the first quadrant bounded by the curve x=y-y3 and the y-axis about the given axes.
a. The x-axis
b. The line y=1
The volume of the solid is π/3.
The regions bounded by the curve x = y - y^3 in the first quadrant and the y-axis are to be revolved around the x-axis and the line y = 1, respectively.
The solids generated by revolving the region in the first quadrant bounded by the curve x=y-y3 and the y-axis about the x-axis are obtained by using disk method.
Therefore, the volume of the solid is:
V = ∫[a, b] π(R^2 - r^2)dx Where,R = radius of outer curve = yandr = radius of inner curve = 0a = 0andb = 1∫[a, b] π(R^2 - r^2)dx= π∫[0, 1] (y)^2 - (0)^2 dy= π∫[0, 1] y^2 dy= π [y³/3] [0, 1]= π/3
The volume of the solid is π/3.The solids generated by revolving the region in the first quadrant bounded by the curve x=y-y3 and the y-axis about the line y = 1 can be obtained by using the washer method.
Therefore, the volume of the solid is:
V = ∫[a, b] π(R^2 - r^2)dx Where,R = radius of outer curve = y - 1andr = radius of inner curve = 0a = 0andb = 1∫[a, b] π(R^2 - r^2)dx= π∫[0, 1] (y - 1)^2 - (0)^2 dy= π∫[0, 1] y^2 - 2y + 1 dy= π [y³/3 - y² + y] [0, 1]= π/3
The volume of the solid is π/3.
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need help please answer
Answer:
123456789
Step-by-step explanation:
123456789123456789123456789123456789123456789123456789123456789123456789123456789123456788912345678912345678912345678912345678912345678 there is your answer
what is 80%of 1,60
will mark brainliest
Answer:
Step-by-step explanation:
Converte 80% into a decimal (devide it by 100) = 0.8
Then multiply 0.8 by 1.60 = 1.28 (final result)
An archaeology club has 54 members. How many different ways can the club select a president, vice president, treasurer, and secretary? There are different slates of candidates possible. (Simplify your answer.)
There are 6,564,816 different slates of candidates possible.
To determine the number of different ways the archaeology club can select a president, vice president, treasurer, and secretary, you can use the permutation formula: n! / (n-r)!, where n is the total number of members (54) and r is the number of positions to fill (4).
The answer can be found by using the permutation formula:
nPr = n! / (n-r)!
Where n is the total number of members in the club (54) and r is the number of positions to be filled (4).
So, the number of different ways the club can select a president, vice president, treasurer, and secretary is:
54P4 = 54! / (54-4)!
= 54 x 53 x 52 x 51
= 6,564,816
Therefore, there are 6,564,816 different slates of candidates possible.
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A new social media site is increasing its user base by approximately 5% per month. If the site currently has 27,870 users, what will be the approximate user base be 6 months from now?
Answer:
37,349
Step-by-step explanation:
month 1
27870 x .05 = 1394
27870 + 1394 = 29264
month 2
29264 x .05 = 1463
29264 + 1463 = 30727
month 3
30727 × .05 = 1536
30727 + 1536 = 32263
month 4
32263 x .05 = 1613
32263 + 1613 = 33876
month 5
33876 x .05 = 1694
33876 + 1694 = 35570
month 6
35570 x .05 = 1779
35570 + 1779 = 37349
Answer:
35,570
Step-by-step explanation:
solution 1 - Multiply by 5%, 6 times. Easter to calculate without a calculator, long process.
1. 27870*1.05= 29,263.5
2. 29263.5*1.05=30726.675
3.repeat
4.repeat
5.repeat
6.repeat
if it's hard for you to multiply by 1.05, you can always divide by 20 or divide by 10 then by 2 (like the below)
1. 27870÷10= 2,787
2. 2787÷2= 1393.5
3. 27870+1393.5 = 29263.5
solution 2 -Fast but probably needs a calculator
1. 27870*1.05^(5)= 35570
1.05 = monthly increase
power of 5 = ^(5) = 6 months - 1 = 5
(2/5)x=(3/20)
pLEASE help i need this quick