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3 years ago

What is the square root of 70 million

Mathematics

1 answer:

lutik1710 [3]3 years ago

8 0

The square root of 70 millions is <span>8366.60026534</span>

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The length of a rectangle is 15ft greater than the width. The area is 100 square ft. Find the length and the Width.

gogolik [260]

Step-by-step explanation:

so let's say that the width is x then the length is x+15

and the area of a square is length times width

x(x+15)=100

x^2+15x-100=0

(x+20)(x-5)=0

x=5 or x=-20 but a side length can't be negative so x would equal 5

Length=x+15 with 5 as x

Length=20

Width=5

Hope that helps :)

7 0

2 years ago

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Find the value of x 11x-15 and 5x-13

Vinvika [58]

11x -15 = 5x-13

or, 11x-5x = -13+15

or, 6x = 2

or, x = 2/6 = 1/3

Answer is 1/3

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2 years ago

What is 3/8 -1/8 plz help me !!!!!

Nuetrik [128]

2/8 is the answer because if you do 3-1 it would equal 2 and then you would put 2 over eight. You can even simplify it to 1/4 because 2 and 8 can both be divided by 2.

6 0

3 years ago

An SRS of 450 450 high school seniors gained an average of ¯ x = 20 x¯=20 points in their second attempt at the SAT Mathematics

maria [59]

Answer: (15.47, 24.53)

Step-by-step explanation:

We know that the confidence interval for population mean is given by :_

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

, where n= sample size.

$\sigma$ = standard deviation.

$\overline{x}$ = sample mean.

z*= Critical value.

Given : n= 450

$\overline{x}=20$

$\sigma=49$

Critical value for 95% confidence = z*=1.96 [From z-value table]

Then, the 95% confidence interval will be :-

$20\pm (1.96)\dfrac{49}{\sqrt{450}}$

$\approx 20\pm (1.96)(2.31)$

$\approx 20\pm 4.53$

$=(20-4.53,\ 20+4.53)=(15.47,\ 24.53)$

Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)

3 0

2 years ago

Find the area of the shape below.

Alecsey [184]

Area = (14 x 20) - ( 5 x 9)

Area = 280 - 45

Area = 235 square cm

4 0

1 year ago

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