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3 years ago

I need help with this math problem.

Mathematics

2 answers:

katrin [286]3 years ago

5 0

Answer:

The answer to your question is s = 399.5 m

Step-by-step explanation:

Formula

$s = \sqrt{\frac{3V}{h}}$

Data

V = 7 500 000 m³

h = 141 m

Substitution

$s = \sqrt{\frac{3(7500000)}{141}}$

$s = \sqrt{\frac{22500000}{141}}$

$s = \sqrt{159574.47}$

s = 399.46 meters ≈ 399.5 meters

lisabon 2012 [21]3 years ago

5 0

Answer:s = 400 meters

Step-by-step explanation:

The volume V of a pyramid with a square base with side length s and height h is

V=1/3s^2h

Solved for s, this formula gives

s = √3V/h

Given that the pyramid has a volume, V of approximately 7500000 cubic meters and the height is approximately 141 meters, the length if the side of the pyramid, s would be

s = √3 × 7500000/141

s = √3 × 53191.4894

s = √159574.4682

s = 399.468

s = 400 meters approximated to the nearest meter

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5 points

Georgia [21]

Answer:

You have to find 3.25% of 205, 000 and then multiply it by 10. Then, you must add that answer to the 205,000. That will be the correct answer.

6 0

3 years ago

g In a certain rural county, a public health researcher spoke with 111 residents 65-years or older, and 28 of them had obtained

Marat540 [252]

Answer:

95% confidence interval for the percent of the 65-plus population that were getting the flu shot is [0.169 , 0.331].

Step-by-step explanation:

We are given that in a certain rural county, a public health researcher spoke with 111 residents 65-years or older, and 28 of them had obtained a flu shot.

Firstly, the Pivotal quantity for 95% confidence interval for the population proportion is given by;

P.Q. = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ~ N(0,1)

where, $\hat p$ = sample proportion of residents 65-years or older who had obtained a flu shot = $\frac{28}{111}$ = 0.25

n = sample of residents 65-years or older = 111

p = population proportion of residents who were getting the flu shot

Here for constructing 95% confidence interval we have used One-sample z test for proportions.

So, 95% confidence interval for the population proportion, p is ;

P(-1.96 < N(0,1) < 1.96) = 0.95 {As the critical value of z at 2.5% level

of significance are -1.96 & 1.96}

P(-1.96 < $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < 1.96) = 0.95

P( $-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < ${\hat p-p}$ < $1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.95

P( $\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ < p < $\hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ) = 0.95

95% confidence interval for p = [ $\hat p-1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ , $\hat p+1.96 \times {\sqrt{\frac{\hat p(1-\hat p)}{n} } }$ ]

= [ $0.25-1.96 \times {\sqrt{\frac{0.25(1-0.25)}{111} } }$ , $0.25+1.96 \times {\sqrt{\frac{0.25(1-0.25)}{111} } }$ ]

= [0.169 , 0.331]

Therefore, 95% confidence interval for the percent of the 65-plus population that were getting the flu shot is [0.169 , 0.331].

7 0

3 years ago

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hammer [34]

Answer:

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8 0

3 years ago

in the 1980s, an average mortgage range was around 18.75%. how much less per month would a $125,000 30 year mortgage be today if

tino4ka555 [31]

Answer:

$1289.48

Step-by-step explanation:

A financial calculator tells you the payment with the higher interest rate is $1960.51, and that with the lower interest rate is $671.03. The difference in payment amounts is ...

$1960.51 -671.03 = $1289.48

3 0

3 years ago

Read 2 more answers

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Ainat [17]

He would maybe have 7.5 but I insist you the answer could be 8 too

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