help giving branliest
Answer:
a
34
b
17
c
46
Step-by-step explanation:
a
Lowest age = 21
Highest age = 55
Range = 34
b
Add them all together and you get 17
c
Median is middle
17 total people
Formula for median:
(n + 1)/2 = th
n is the total
17 + 1 is 18
18 halved is the 9th number
The 9th number is 46
An e-commerce Web site claims that 8% of people who visit the site make a purchase. A random sample of 15 people who visited the Web site is randomly selected. What is the probability that less than 3 people will make a purchase? The probability is _________
(Round to four decimal places as needed.)
The probability that less than 3 people will make a purchase is 0.886.
What is the probability?The probability that less than 3 people will make a purchase is calculated as follows;
The probability of less than 3 people is given as;
P(X < 3) = P(X = 0) + P(X = 1) + P(X = 2)
The probability for 0;
P(X = 0) = (15C₀)(0.08⁰) x (1 - 0.08)¹⁵⁻⁰
P(X = 0) = 0.286
The probability for 1;
P(X = 1) = (15C₁)(0.08¹) x (1 - 0.08)¹⁵⁻¹
P(X = 1) = 0.373
The probability for 2;
P(X = 2) = (15C₂)(0.08²) x (1 - 0.08)¹⁵⁻²
P(X = 2) = 0.227
The probability of less than 3 people is = 0.286 + 0.373 + 0.227
= 0.886
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The slope-interest equation of a line is y=4x-1. what is the slope of the line?
\(y = mx + b \\ \\ from \: this \\ slope(m) = 4\)
PLEASE GIVE BRAINLIEST
The line's slope is:
4Work/explanation:
Since we're given an equation in slope intercept form, we can find the slope pretty easily. There's a trick to finding the slope.
With this type of equations, the slope is the number in front of x.
That leads us to the conclusion that the slope of y = 4x - 1 is 4.
Hence, the slope is 4.The patellar tendon attaches to the tibia at a 20 degree angle 2. 5 cm from the axis of rotation at the knee. If the tension in the tendon is 500 n, what is the resulting angular acceleration of the 4. 2 kg lower leg and foot given a radius of gyration of 25 cm for the lower leg/foot with respect to the axis of rotation at the knee?.
The resulting angular acceleration of the 4. 2 kg lower leg and foot given a radius of gyration of 25 cm is equal to 16.29rad/s².
As given in the question,
Tension 'F' = 500 N
Angle of attachment =20°
Axis of rotation at the knee = 2.5 cm
= 0.025m
Torque produced by the knee
T = F × d⊥
= 500 × 0.025 × sin20°
= 500 N × 0.025 m × 0.342
= 4.275Nm
Moment of inertia of the knee
I = mr²
Mass 'm' = 4.2kg
Radius of gyration 'r' = 25 cm
= 0.25 m
I = 4.2 × (0.25)²
= 4.2 × 0.0625
= 0.2625 kgm²
Formula based on moment of inertia, torque and angular acceleration
T = I∝
⇒∝ = T / I
⇒∝ = 4.275 / 0.2625
∝ =16.29rad/s²
Therefore, for the given values the resulting angular acceleration is 16.29rad/s²
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Review Test Questions
Part 1 of 1 -
Question 4 of 10
What is 14 14 divided by 72 in simplest form?
O A. 2
Which of the following sets contain only rational numbers?
Answer:
Option BStep-by-step explanation:
Option A
One of the numbers is not rational √50 = 5√2, since √2 is irrationalOption B
All numbers are rationalOption C
18π is irrational since π is irrationalOption D
0.1234... is irrational as non-terminating and non-repeating decimal
Ayana makes a conjecture that the sum of two odd integers is an even integer.
a. List information that supports this conjecture. Then explain why the information you listed does not prove that this conjecture is true.
The information that supports the conjecture is the observation that the sum of certain pairs of odd integers results in even integers.
To list information that supports the conjecture that the sum of two odd integers is an even integer, we can consider some examples:
1. 3 + 5 = 8
2. -7 + -1 = -8
3. 13 + 19 = 32
In each of these examples, the sum of two odd integers results in an even integer.
However, it is important to note that listing a few examples does not provide conclusive proof for the conjecture. To prove the conjecture, we need to show that it holds true for all possible cases, which requires a more rigorous and general approach.
To counter the conjecture, we can provide a counterexample where the sum of two odd integers does not result in an even integer:
-1 + 1 = 0
In this case, the sum of two odd integers (both -1 and 1) is an even integer (0).
Therefore, while the examples provided support the conjecture, the existence of a counterexample disproves the conjecture. This illustrates that it is necessary to consider all possible cases and provide a logical and mathematical explanation to prove or disprove a conjecture.
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what is the surface area of 9m 6m and 4m
Answer:
228m²
Step-by-step explanation:
Solve the multi step problem below Parts a through e (it’s all one question)
Compound Interest
The final value (FV) of an investment P after t years is calculated with the formula:
\(FV=P(1+\frac{r}{m})^{m\cdot t}\)Where r is the annual interest rate and m is the number of compounding periods per year.
We are given the following data:
P = $7000
t = 13 years
r = 7% = 7 / 100 = 0.07
The compounding period varies from part to part.
a) Annually
In this case, m = 1 because the money compounds once per year. Applying the formula:
\(FV=7000(1+\frac{0.07}{1})^{1\cdot13}\)Calculating:
\(\begin{gathered} FV=7000(1.07)^{13} \\ \\ FV=16868.92 \end{gathered}\)The final value is $16868.92
b) Semiannually. The money compounds twice a year, so m = 2. Applying the formula:
\(\begin{gathered} FV=7000(1+\frac{0.07}{2})^{2\cdot13} \\ \\ FV=7,000(1+0.035)^{26} \\ \\ FV=17121.71 \end{gathered}\)The final value is $17121.71
c) Quarterly. The money compounds 4 times a year, so m = 4. Applying the formula again:
\(\begin{gathered} FV=7000(1+\frac{0.07}{4})^{4\cdot13} \\ \\ FV=7,000(1+0.0175)^{52} \\ \\ FV=17253.92 \end{gathered}\)The final value is $17253.92
d) Daily (calendar year). In this case, we use m = 365:
\(\begin{gathered} FV=7000(1+\frac{0.07}{365})^{365\cdot13} \\ \\ FV=7,000(1+0.0001917808)^{4745} \\ \\ FV=17388.74 \end{gathered}\)The final value is $17388.74
e) Continuously. We use a slightly different formula here:
\(FV=P\cdot e^{rt}\)Applying the formula:
\(\begin{gathered} FV=7000\cdot e^{0.07\cdot13} \\ \\ FV=17390.26 \end{gathered}\)The final value is $17390.26
Help me on this please
Answer:
Choice B
Step-by-step explanation:
Triangles JKL and TVW are similar by SAS similarity postulate
Triangle similarity-
Solve for x!!!
Please help!
Answer: im thinking it is 5 but i could be totally wrong. im not the smartest lol
Step-by-step explanation:
if f(x) = x^2 - 4 and g (x) = x + 1 simplify the following
f( x ) + g( x ) =
f( x ) - g( x ) =
f( x ) / g( x ) =
f( x ) * g( x ) =
The values of functions are:
a) f( x ) + g( x ) = x² + x - 3
b) f( x ) - g( x ) = x² - x - 5
c) f( x ) / g( x ) = x² - 4/ (x+ 1)
d) f( x ) * g( x ) = x³ + x² - 4x - 4
what is function?In mathematics, a function is represented as a rule that produces a distinct result for each input x. In mathematics, a function is indicated by a mapping or transformation. Typically, these functions are identified by letters like f, g, and h. The collection of all the values that the function may input while it is defined is known as the domain. The entire set of values that the function's output can produce is referred to as the range. The set of values that could be a function's outputs is known as the co-domain.
Given:
f(x) = x² - 4 and g (x) = x + 1
a) f( x ) + g( x )
= x² - 4 + x+ 1
= x² + x - 3
b) f( x ) - g( x )
= x² - 4 - ( x+ 1)
= x² - 4 - x- 1
= x² - x - 5
c) f( x ) / g( x )
= x² - 4/ (x+ 1)
d) f( x ) × g( x )
= (x²- 4)( x+ 1)
= x³ + x² - 4x - 4
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The times taken by Amal to run three races were 3 minutes 10 seconds, 2 minutes 58.2 seconds and 3 minutes 9.8 seconds. Find the average time taken, giving your answer in minutes.
each member of a random sample of 15 business economists was asked to predict the rate of in??ation for the coming year. assume that the predictions for the whole population of business economists follow a normal distribution with standard deviation 1.8%. a) (4pts) the probability is 0.01 that the sample standard deviation is bigger than what number? 0:01
The number for which the sample standard deviation is exceeded with a probability of 0.01 is approximately 29.143.
What is the number for which the sample standard deviation will exceed the probability of 0.01?To find the probability that the sample standard deviation is bigger than a certain number, we can use the chi-square distribution.
Given:
Sample size (n) = 15
Standard deviation of the population (σ) = 1.8%
Significance level (α) = 0.01 (1%)
To find the critical chi-square value, we need to determine the degrees of freedom. For a sample standard deviation, the degrees of freedom are (n - 1).
Degrees of freedom (df) = 15 - 1 = 14
Using a chi-square distribution table or calculator with 14 degrees of freedom and a significance level of 0.01, we find the critical chi-square value to be approximately 29.143.
The probability that the sample standard deviation is bigger than a certain number can be interpreted as the probability of having a chi-square value greater than that number.
Therefore, the probability that the sample standard deviation is bigger than the critical chi-square value of 29.143 is 0.01 or 1%.
In summary, the probability is 0.01 that the sample standard deviation is bigger than 29.143.
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Lana finished the race and 13. 2 seconds if 84 other girls ran in the event approximately how many runners does she beat
Using binomial probability, the number of runners which Lana beat is 21.
Given the parametersMean, μ = 13 seconds
Standard deviation, σ = 0.3
Lana's time = 13.2
proportion of runners who had race time above 13.2 can be related by the binomial equation:
P(x > 13.2)
Calculate the Zscore:
Zscore = (x - μ) / σ
Z = (13.2 - 13) / 0.3
Zscore = 0.2 / 0.3 = 0.6667
Using a table or Z-probability calculator:
P(Z > 0.6667) = 0.2524
This is about 0.2524 * 100 = 25.24% = 25% (nearest percent)
25% of 84 runners would be :
0.25 * 84 = 21
Therefore, Lana beat 21 runners.
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Complete question :
The 100m dah times in the girl's track meet were normally distributed with a mean of 13 seconds and a standard deviation of 0.3 seconds.
Lana finished the race in 13.2 seconds . If 84 other girls ran in the event, approximately how many runners did she beat?
The skateboard rita wants to buy is 6 dollars less than 3 times the amount she has saved. the skateboard is 69 dollars. how much has rita saved
Answer:
$25
Step-by-step explanation:
money=x
3x-6=69
3x=75
x=25
Hope this helps plz hit the crown :D
Answer:
%25 dollars saved
Step-by-step explanation:
I NEED HWLP CAN U HELP ME?
Answer:
y=mx+c
Step-by-step explanation:
noice
construct a 2x2 matrix whose element are given by i+j
9514 1404 393
Answer:
see below
Step-by-step explanation:
Assuming i and j refer to the row and column of a given element, that matrix would be ...
\(\left[\begin{array}{cc}2&3\\3&4\end{array}\right]\)
__
Rows are numbered top down, starting with 1. Columns are numbered left-to-right, starting with 1. The upper left element is in row 1, column 1, so has a value here of 1+1 = 2. Each number is one more than the one to its left. Each number is 1 more than the one above it.
I am going to send the pictures Please solve question b(b) Canada like many countries use the metric system if the Canada news says it’s-2 degrees Celsius what is that in Fahrenheit ( Celsius is typically rounded to the tenth place
Given equation:
\(\text{ Wind Chill = }35.74\text{ }+\text{ }0.6215T\text{ }-\text{ 35}.75(V^{0.16})\text{ }+\text{ }0.4275T(V^{0.16})\)Where T = temperature in Fahrenheit and
V = wind speed in miles per hour
Conversion formulas:
\(\begin{gathered} A_s\text{ = }M_s\text{ }\times\text{ }0.62 \\ F\text{ = 1.8C + 32} \end{gathered}\)Question (b)
We are required to convert -2 degree Celsius to Fahrenheit
Using the conversion formula:
\(\begin{gathered} F\text{ = }1.8\text{ }\times-2\text{ + 32} \\ =\text{ 28.4} \end{gathered}\)Answer: 28.4 F
calculate the average of the following set of values: 18,4,12.99,13.772 and 9.704
The average of the given values 18, 4, 12.99, 13.772, and 9.704, is approximately 11.6932.
The average of the values 18, 4, 12.99, 13.772, and 9.704 can be calculated by summing all the values and dividing by the total number of values.
To calculate the average, also known as the arithmetic mean, of a set of values, we add up all the values and then divide the sum by the total number of values.
In this case, we have the values 18, 4, 12.99, 13.772, and 9.704.
To find the average, we add up all the values:
18 + 4 + 12.99 + 13.772 + 9.704 = 58.466
Next, we divide the sum by the total number of values, which in this case is 5:
58.466 / 5 = 11.6932
Therefore, the average of the values 18, 4, 12.99, 13.772, and 9.704 is approximately 11.6932.
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what are the zeros of f(x)=(x-9)
Answer:
There would only be one zero and it would be x = 9.
Step-by-step explanation:
Hope it helps!
I NEED HELP ON THIS ASAP!!!!!!!
Answer: Cant give you an explanation, but the slope is -2.
I don't know if you need the answer to the questions above, if u do, lmk.
Which relationships could have a negative correlation? Select three options. number of hours on video games and test scores speed of a car and minimum stopping distance average running speed and total race time adult’s head circumference and age outside temperature and amount of a heating bill
Answer:
- number of hours on video games and test scores
- average running speed and total race time
- outside temperature and amount of a heating bill
Step-by-step explanation:
1. number of hours on video games and test scores (negative correlation - as you spend more hours on video games, test scores might decrease)
2. speed of a car and minimum stopping distance (positive correlation - as the distance to the next stop increases, the speed of the car should increase)
3. average running speed and total race time (negative correlation - as you run for longer, your speed should decrease)
4. adult’s head circumference and age (positive correlation - as your age increases, your head size increases, too)
5. outside temperature and amount of a heating bill (negative correlation - as temperature increases, the heating bill decreases)
The two options with negative correlations are:
"Number of hours on video games and test scores" and "Outside temperature and amount of a heating bill"
Which relationship could have a negative correlation?A relation between two variables, x and y, has a negative correlation when if one variable increases, the other decreases.
From the options, the ones that can have a negative correlation are:
Number of hours on video games and test scores: Here as the number of hours that you play video games increases, it is possible that your test scores decrease, so we have a negative correlation.
Outside temperature and amount of a heating bill: As the outside temperature decreases, the amount that you pay in heating increases, so again, we have a negative correlation.
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Carmen is packing moisturizing bath powder into spherical molds.
She has enough powder to fill about 12 spherical molds with a diameter of 4 cm.
How many spherical molds with a diameter of 5 cm could she fill with the same amount of powder?
She would be able to fill only one spherical mold with a diameter of 5 cm.
To calculate the number of spherical molds with a diameter of 5 cm that Carmen can fill with the same amount of powder, we need to compare the volumes of the two different sizes of molds.
The formula for the volume of a sphere is given by:
V = (4/3) * π * r^3
where V is the volume and r is the radius of the sphere.
Let's calculate the volumes of the two different sizes of molds:
For the molds with a diameter of 4 cm:
- Radius (r) = diameter / 2 = 4 cm / 2 = 2 cm
- Volume (V1) = (4/3) * π * (2 cm)^3 ≈ 33.51 cubic centimeters
For the molds with a diameter of 5 cm:
- Radius (r) = diameter / 2 = 5 cm / 2 = 2.5 cm
- Volume (V2) = (4/3) * π * (2.5 cm)^3 ≈ 65.45 cubic centimeters
Now, let's calculate the number of molds with a diameter of 5 cm that can be filled with the same amount of powder:
Number of molds = V1 / V2 = 33.51 cubic centimeters / 65.45 cubic centimeters ≈ 0.512
Since we can't have a fraction of a mold, Carmen would be able to fill 0 molds with a diameter of 5 cm with the same amount of powder. In other words, she would not be able to fill any spherical molds with a diameter of 5 cm using the given amount of powder.
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Find the unknown side lengths in these right triangles.
When is it true the Pythagorean Theorem is..?
A) True for all triangles
B) True for all right triangles
C) True for some right triangles
D) Never true
Answer:
Triangle 1 - \(\sqrt{29\) (if they want simplest radical form) or 5.4 (if they want to the nearest tenth)
Triangle 2- i couldnt figure this one out- may not be true
Pythagorean Theorem is... C) true for all right triangles
Step-by-step explanation:
Convert the mixed numbers to improper fractions.
Aim :
We have to convert them into improper fractions as they are into mixed fractions. So let's start..!!
Solution :
1) \( \bf{ 1\dfrac{5}{8} }\)
Multiply 8 into 1 and add 5 into it,
\(: \: \implies \: \sf{ \dfrac{8 \times 1 \: + \: 5}{8}} \\ \\ : \: \implies \: \sf{ \dfrac{8 \: + \: 5}{8}} \\ \\ : \: \implies \: \red{\sf{ \dfrac{13}{8}}}\)
_______________________________________
2) \( \bf{ 4\dfrac{2}{5} }\)
Multiply 4 into 5 and add 2 into it.
\(: \: \implies \: \sf{ \dfrac{4\times 5 \: + \: 2}{5}} \\ \\ : \: \implies \: \sf{ \dfrac{20 \: + \: 2}{5}} \\ \\ : \: \implies \: \red{\sf{ \dfrac{22}{5}}}\)
_______________________________________
3) \( \bf{ 2\dfrac{6}{8} }\)
Multiply 8 into 2 and add 6 into it after multiplying.
\(: \: \implies \: \sf{ \dfrac{2 \times 8 \: + \: 6}{8}} \\ \\ : \: \implies \: \sf{ \dfrac{16 \: + \: 6}{8}} \\ \\ : \: \implies \: \red{\sf{ \dfrac{22}{8}}}\)
I could have given up, but I thought about my grandmother. She always told me that "people who believe that science is the answer to everything are missing out on everything else." With her words in mind, I searched some more. There were many facts that hinted that dragons may not be fictional. I noticed that cultures across the world all described dragons in similar ways. This was odd because they had no way to communicate with each other. I found dragons mentioned in more than just stories. They appeared in old legal papers, in the travel logs of Marco Polo, and in the Bible. I saw that the Chinese calendar uses a different animal each year. Dragons are included along with eleven real animals. I began to believe it was a real possibility that all of these people were talking about a creature that actually existed.
The text discusses the Chinese calendar by writing, "Dragons are included along with eleven real animals."
What does that imply? (5 points)
Dragons are the only fake animal on the Chinese calendar.
Dragons are not the only fake animal on the Chinese calendar.
Dragons are real because all the other animals on the calendar are fake.
Dragons are real because all the other animals on the calendar are real.
Answer:
Dragons are real because all the other animals on the calendar for real.
Step-by-step explanation:
Hope this helps.
When Liz woke up in the morning, it was 6°F. By the late afternoon, the temperature had dropped 9°F.
The temperature in the late afternoon is -3°F.
According to the question,
We have the following information:
When Liz woke up in the morning, it was 6°F. By the late afternoon, the temperature had dropped 9°F.
Now, we can easily find the temperature in late afternoon.
To find this, we will have to subtract 9 from 6 because the temperature has dropped from 6.
(Please note that the temperature given here is in ° F. However, it is to be noted that the two most commonly used units of temperature are °F and °C.)
So, we have the following expression:
6-9
-3°F
Hence, the temperature in the late afternoon is -3°F.
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find the volume of the prism below
The volume of the prism with given dimensions in the figure is equal to 612√3 cubic millimeter.
The dimensions of the triangular prism are,
Base of the triangle 'B' = 12mm
let us consider 'h' be the height of the triangle base.
Which intersect base at midpoint
height of the triangle 'h' = √ 12² - 6²
= √108
= 6√3mm
Side length of the prism 'l' = 17mm
Volume of the triangular prism
= ( 1/2 ) × Base × height × length of the side
= ( 1/2 ) × B × h × l
Now , substitute the values we have,
⇒ Volume of the triangular prism = (1/2) × 12 × 17 × 6√3
⇒ Volume of the triangular prism = 612√3 cubic millimeter.
Therefore, the volume of the triangular prism is equal to 612√3 cubic millimeter.
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What is the area of the figure below?
Answer:
104
Explanation:
1. Split the figure by the line the larger portion creates.
2. Calculate the area of the left-hand side... 7 · 8 = 56cm squared.
3. You know that the total length of the figure is 15cm. You've already "used" 7cm of that. So... 15 - 7 = 8.
4. Now, we simply do 6 · 8 = 48. Almost there!
5. Finally, add the values of the left side and the right side (48 + 56 = 104)
6. YOUR ANSWER IS 104 cm squared.