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3 years ago

A bicycle wheel has a circumference of 38 inches . What is the approximate length of the radius of the wheel

Mathematics

1 answer:

Inessa [10]3 years ago

3 0

Answer:
The answer would be, 19

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(28 points) In the drawing, a regular polygon is partially covered by a rectangle. what is the number of sides of this polygon?

alexira [117]

Answer:

c:8

Step-by-step explanation:

✔

3 0

3 years ago

Read 2 more answers

In Pennsylvania the average IQ score is 101.5 The variable is normally distributed and the population standard deviation is know

elena-14-01-66 [18.8K]

Answer:

P-value = 0.0368

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 101.5

Sample mean, $\bar{x}$ = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 101.5\\H_A: \mu> 101.5$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }$

Putting all the values, we have

$z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789$

Now, $z_{critical} \text{ at 0.05 level of significance } = 1.64$

Since,

$z_{stat} > z_{critical}$

We reject the null hypothesis and accept the alternate hypothesis. Thus, students in Pennsylvania have an IQ that is significantly greater than the state average.

P-value can be calculated with the standard normal table.

P-value = 0.0368

P-value is lower than the significance level.

4 0

3 years ago

Perimeter of this shape

Dahasolnce [82]

Answer:

54cm

Step-by-step explanation:

Because you have to add the numbers on the outside only so 17+17=34+10=44+10=54cm

6 0

3 years ago

Learning Task 2. Fill in the largest unit digit to make them divisible

evablogger [386]

Answer:

4 is the correct answer

3 0

3 years ago

What equation can be written for this graph? <br> Pls help!!!

defon

Answer:

y = 25x

Step-by-step explanation:

This is a straight line, so the formula is:

y = ax + b

a is the slope and b is the y-intercept.

Slope formula:

a = (y2 - y1)/(x2 - x1)

Select two random points from the line:

Point 1: x=2 and y=50
Point 2: x=4 and y=100

Slope a = (100 - 50)/(4 - 2) = 50/2 = 25

=> y = 25x + b

Use one of the points to find b:

50 = 25*2 + b

=> b= 0

So the equation is y=25x

7 0

2 years ago

Read 2 more answers