A box of 15 cookies costs 9$ what is the cost for one cookie

Mathematics

2 answers:

Butoxors [25]2 years ago

7 0

Answer:

Should be 0.6 or 60 cents per cookie

Step-by-step explanation:

To find this all you gotta do is divide 15 by 9.

xz_007 [3.2K]2 years ago

5 0

Answer:

15c=9...

1c=9/15.....

=0.6$..

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Step-by-step explanation:

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3 years ago

Read 2 more answers

We are interested in conducting a study to determine the percentage of voters of a state would vote for the incumbent governor.

Vladimir [108]

Answer:

$n=\frac{0.5(1-0.5)}{(\frac{0.05}{1.96})^2}=384.16$

And rounded up we have that n=385

Step-by-step explanation:

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ . And the critical value would be given by: