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3 years ago

Please answer both of these questions. :) Thank you!

Mathematics

1 answer:

son4ous [18]3 years ago

7 0

Answers:
Wood Question: 860 millimeters
Heigh Question: 73 centimeters

Explanations:
Wood Question: You can get this result by doing 7.74/9 because you are dividing 7.74 meters into 9 pieces and you will get 0.86, AKA 86 centimeters. Then, you need to multiply that by 10 to convert it into millimeters and 86(10) is 860.

Height Question: First, you want to do 1.46/2 and you will get 0.73. 0.73 meters is equivalent to 73 centimeters, and since you know Jaxson is two times his sister's height, you know that you can leave it at that, therefore your final answer is 73 centimeters.

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Given that a random variable X is normally distributed with a mean of 2 and a variance of 4, find the value of x such that P(X &

Drupady [299]

Given that a random variable X is normally distributed with a mean of 2 and a variance of 4, find the value of x such that P(X < x)=0.99 using the cumulative standard normal distribution table

Answer:

6.642

Step-by-step explanation:

Given that mean = 2

standard deviation = 2

Let X be the random Variable

Then X $\sim$ N(n, $\sigma$ )

X $\sim$ N(2,2)

By Central limit theorem;

$z = \dfrac{X - \mu}{\sigma} \sim N(0,1)$

$z = \dfrac{X - 2}{2} \sim N(0,1)$

P(X<x) = 0.09

$P(Z < \dfrac{X-\mu}{\sigma })= 0.99$

$P(Z < \dfrac{X-2}{2})= 0.99$

P(X < x) = 0.99

$P(\dfrac{X-2}{2}< \dfrac{X-2}{2})=0.99$

$P(Z< \dfrac{X-2}{2})=0.99$

$\phi ( \dfrac{X-2}{2})=0.99$

$( \dfrac{X-2}{2})= \phi^{-1} (0.99)$

$( \dfrac{X-2}{2})= 2.321$

X -2 = 2.321 × 2

X -2 = 4.642

X = 4.642 +2

X = 6.642

4 0

3 years ago

In a bag of marbles, the ratio of white marbles to red marbles is 3:4 and the ratio of red to black marbles is 8:11. What is the

Ierofanga [76]

Answer:

6:11

4 red x2 is 8 red

than multiply 3 white to get 6

4 0

3 years ago

Read 2 more answers

Is (y^m) = (y^n) a true statement

jeyben [28]

Answer:

False.

Step-by-step explanation:

The left side is not equal to the right side, which means that the given statement is false.

3 0

3 years ago

defon

Answer:

so the distance between the police and the library is 2x-3 where x is the distance between the police and fire and distance between the library and fire is 5 so

2x-3=5

2x=8

x=4

so C

Hope This Helps!!!

5 0

3 years ago

The price of an item has been reduced by 85% the original price was $95 what is the price of the item

Yanka [14]

Answer:

14.25

Step-by-step explanation:

95 x 0.85 = 80.75

95-80.75 = 14.25

3 0

3 years ago