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3 years ago

Solve for pi : C = 2 pi r

Mathematics

2 answers:

Kruka [31]3 years ago

5 0

Answer:

π= C/2r

Step-by-step explanation:

In order to solve for pi, we must get pi by itself on one side of the equation.

C= 2πr

Let's rearrange the right side of the equation. We can do this because of the commutative property of multiplication.

C= 2πr

C= 2r* π

pi is now being multiplied by 2r. The inverse of multiplication is division. Divide both sides of the equation by 2r.

C/2r= 2r*π/2r

C/2r= π

π=C/2r

ycow [4]3 years ago

4 0

Answer:

$\frac{C}{2r}$ =pi

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Answer:

$y = \frac{1}{2} x + \frac{5}{2}$

Step-by-step explanation:

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3 years ago

Assume a simple random sample of 10 BMIs with a standard deviation of 1.186 is selected from a normally distributed population o

kirza4 [7]

Answer:

a) H0: $\sigma = 1.34$

H1: $\sigma \neq 1.34$

b) $df = n-1= 10-1=9$

And the critical values with $\alpha/2=0.005$ on each tail are:

$\chi_{\alpha/2}= 1.735, \chi_{1-\alpha/2}= 23.589$

c) $t=(10-1) [\frac{1.186}{1.34}]^2 =7.05$

d) For this case since the critical value is not higher or lower than the critical values we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not significantly different from 1.34

Step-by-step explanation:

Information provided

n = 10 sample size

s= 1.186 the sample deviation

$\sigma_o =1.34$ the value that we want to test

$p_v$ represent the p value for the test

t represent the statistic (chi square test)

$\alpha=0.01$ significance level

Part a

On this case we want to test if the true deviation is 1,34 or no, so the system of hypothesis are:

H0: $\sigma = 1.34$

H1: $\sigma \neq 1.34$

The statistic is given by:

$t=(n-1) [\frac{s}{\sigma_o}]^2$

Part b

The degrees of freedom are given by:

$df = n-1= 10-1=9$

And the critical values with $\alpha/2=0.005$ on each tail are:

$\chi_{\alpha/2}= 1.735, \chi_{1-\alpha/2}= 23.589$

Part c

Replacing the info we got:

$t=(10-1) [\frac{1.186}{1.34}]^2 =7.05$

Part d

For this case since the critical value is not higher or lower than the critical values we have enough evidence to FAIL to reject the null hypothesis and we can conclude that the true deviation is not significantly different from 1.34

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3 years ago

Jose paid $875 on TV. The sales tax was 8%. How much money did he pay in sales tax?

Elis [28]

Answer:

64.81

Step-by-step explanation:

x + .08x = 875

1.08x = 875

x = 810.19 (price of tv)

810.19 x .08 = 64.81

6 0