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3 years ago

20 area and 4 is the height what is the base

Mathematics

2 answers:

ohaa [14]3 years ago

7 0

5 because area=base x height

notsponge [240]3 years ago

6 0

The base is 5 because 4×5 is 20

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HELP ME ASPA!!!!! Round your answer to the nearest hundredth. AC=

vladimir1956 [14]

Hello :) ok so to find AC you would have to use sin. It would be sin70= x/4. To find AC you would have to multiply 4 by sin70 which is 3.758 or to the nearest hundredth would be 3.76. I hope I helped, if you need a more in depth explanation lmk

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3 years ago

What is 1928912 times 192 divided by 182 times 9 plus 4 - 12378923789 times -52?

qaws [65]

(1928912×192) ÷ (182×9) + 4- (12378923789×-52)

= 6.437042e11

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3 years ago

Write an equation on the line with a slope of 2/3 and y intercept of -8

gtnhenbr [62]

Answer:

y = 2/3x-8

Step-by-step explanation:

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3 years ago

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masha68 [24]

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3 0

3 years ago

Read 2 more answers

A research engineer for a tire manufacturer is investigating tire life for a new rubber compound. She has built 10 tires and tes

n200080 [17]

Answer:

The standard deviation of tire life does exceed 3000 km

Step-by-step explanation:

This is a Chi-Square Hypothesis Test for the Standard Deviation, here we have

$\bf H_0: \sigma = 3000$

$\bf H_a: \sigma > 3000$

so, this is an upper one-tailed test.

The test statistic is

$\bf T=\frac{(n-1)s^2}{\sigma^2}$

where

n = 10 is the sample size

s = sample standard deviation

$\bf \sigma$ = population standard deviation

we would reject the null hypothesis if

$\bf T>\chi^2_{(\alpha,n-1)}$

where

$\bf \chi^2_{(\alpha,n-1)}$

is the critical value corresponding to the level of significance $\bf \alpha$ with n-1 degrees of freedom.

we can use either a table or a spreadsheet to compute this value.

In Excel use

CHISQ.INV(0.05,9)

In OpenOffice Calc use

CHISQINV(0.05;9)

and we get this value equals 3.3251

Working out our T statistic

$\bf T=\frac{(n-1)s^2}{\sigma^2}=\frac{9*(2990)^2}{(3000)^2}=8.9401$

Since T > 3.3251 we reject the null and conclude that the standard deviation of tire life exceeds 3000 km.

7 0

3 years ago