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4 years ago

Please help with correct answer please! (:

Mathematics

1 answer:

wolverine [178]4 years ago

4 0

You put it into a graphing calculator and it'll come up with answer D.

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Emmet deposited $90 in a savings account earning 10% interest, compounded annually.

Tju [1.3M]

Answer:

29.79

Step-by-step explanation:

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3 years ago

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The price of a pack of kitchen rolls is reduced by 1/6

sweet-ann [11.9K]

Answer: 1.44

Step-by-step explanation:

(original price) - (1/6 of the original price) = 1.20

If you let x = original price, then the equation is:

x - 1/6 x = 1.20

5/6 x = 1.20

x = 1.44

the original price is £1.44.

Credits to the person who also answered :)

I hope this helps!

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2 years ago

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Two bands are marching in a parade there are 32 people in the first band 40 people in the second band the same number of people

Paraphin [41]

Eight people in each row

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3 years ago

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Find the 90% confidence interval for the variance and standard deviation of the ages of seniors at oak park college if a random

san4es73 [151]

Given that the standard deviation, s = 2.3 and that there are 24 students, thus the degree of freedom is 24 - 1 = 23.

For 90% confidence interval, $\alpha =0.1$ and $\frac{ \alpha }{2} =0.05$

From the chi-square table, the value of $\chi^2_{1- \frac{ \alpha }{2} }=\chi^2_{0.95}=35.172$ and the value of $\chi^2_{ \frac{ \alpha }{2} }=\chi^2_{0.05}=13.091$ .

The 90% confidence interval for $\sigma^2$ is given by:

$\frac{(n-1)s^2}{\chi^2_{1- \frac{ \alpha }{2} }} \ \textless \ \sigma^2\ \textless \ \frac{(n-1)s^2}{\chi^2_{ \frac{ \alpha }{2} }} \\ \\ = \frac{(24-1)(2.3)^2}{35.172} \ \textless \ \sigma^2\ \textless \ \frac{(24-1)(2.3)^2}{13.091} \\ \\ = \frac{23(5.29)}{35.172} \ \textless \ \sigma^2\ \textless \ \frac{23(5.29)}{13.091} = \frac{121.67}{35.172} \ \textless \ \sigma^2\ \textless \ \frac{121.67}{13.091} \\ \\ =3.46\ \textless \ \sigma^2\ \textless \ 9.29$

And the 90% confidence interval for $\sigma$ is given by:

$\sqrt{\frac{(n-1)s^2}{\chi^2_{1- \frac{ \alpha }{2} }}} \ \textless \ \sigma\ \textless \ \sqrt{\frac{(n-1)s^2}{\chi^2_{ \frac{ \alpha }{2} }}} \\ \\ = \sqrt{3.46} \ \textless \ \sigma\ \textless \ \sqrt{9.29} =1.86\ \textless \ \sigma\ \textless \ 3.05$

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3 years ago

Which expression has a value of 36?

Andrew [12]

The correct answer is A. 9/12 times 48.

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4 years ago

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