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3 years ago

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Katy makes 48 cookies an hour. If she has 24 alr, how long would it take her to make 120?

1 answer:

rosijanka [135]3 years ago

3 0

Question:

Katy makes 48 cookies an hour. If she has 24 already, how long would it take her to make 120?

Answer:

It takes 2.5 hours for Katy to make 120 cookies

Step-by-step explanation:

Given:

Time taken to make 48 cookies = 1 hour

To Find:

Time taken to make 120 cookies = ?

Solution:

Time taken to make 48 cookies = i hour

So now time taken to make 1 cookie = $\frac{1}{48} hour$

So time taken to make 120 cookies

= Number of cookies X time taken to make one cookie

=> $120 \times \frac{1}{48}$

=> $\frac{120}{48}$

=> 2.5 hours

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Complete Question

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a

$SE = 0.66}$

b

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Step-by-step explanation:

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The second sample mean is $\= x _2 = 10$

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Generally the second standard deviation is

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=> $\sigma_2 = 0.742$

Generally the first standard error is

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Generally the second standard error is

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$(\= x_1 -\= x_2) -(Z_{\frac{\alpha }{2} } * SE) < \mu_1 - \mu_2 < (\= x_1 -\= x_2) +(Z_{\frac{\alpha }{2} } * SE)$

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=> $-3.29 < \mu_1 - \mu_2 < -0.70$

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