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Gemiola [76]
3 years ago
15

A country's population in 1991 was 15 million. In 2001 it was 16 million. Estimate the population in 2005 using thr exponential

growth formula. Round your answer to the nearest million.
Mathematics
1 answer:
topjm [15]3 years ago
3 0
Probably 19 or 18 million, because of the growth formula
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At the Foremost State Bank the average savings account balance in 2012 was $1900. A random sample of 45 savings account balanes
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Answer:

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

Step-by-step explanation:

<u><em>Step(i)</em></u>:-

Mean of the Population = 1900

Given random sample size 'n' =  45

Mean of the sample x⁻ = 1000

Standard deviation of the sample = 225

<u><em>Null Hypothesis</em></u>:-

There is no difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012.

<u><em>Alternative Hypothesis</em></u> :-

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

<u><em>Step(ii</em></u>):-

Test statistic

        t = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } }

        t = \frac{1000-1900 }{\frac{225}{\sqrt{45} } }

       t = -900 /33.54 = -26.517

      |t| = |-26.517|=26.517

Degrees of freedom

                       γ = n-1 = 45-1 =44

t₍₀.₀₁ , ₄₄₎ = 2.326

The calculated  |t| = |-26.517|=26.517 > 2.326 at 0.01 level of significance

Null hypothesis is rejected at 0.01 level of significance

There is difference between mean savings account balance in 2013 is different from the mean savings account balance in 2012

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2 years ago
PLZZ HELP I NEED ANSWER RNNNNNNB
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Answer:

Surface Area = 82.8 square meters

Volume = 37.96 cubic meters

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6 × 2 × 9.49 = 113.88

113.88 ÷ 37.96

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42 divided by 3 is 14
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