2 years ago

Jack said, " Five times my age in 2 years is 100." How old is Jack now?

1 answer:

3 0

Jack is 18 years old

First divide 100 by 5 and you get 20, right? 20 is 2 years older than Jack is. So subtract 2 from 20 years and you get 18 years, Jack's age.

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Two catalysts in a batch chemical process, are being compared for their effect on the output of the process reaction. A sample o

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Answer:

2.083 < µ1 - µ2 < 5.917

Step-by-step explanation:

We will need to construct a 90% confidence interval for the difference of 2 means where the populations are normally distributed, and their variances are equal.

The calculations of the sample means and standard deviations are done for us.

Sample 1: Catalyst 1

n = 12, x = 85, s = 4

Sample 2: Catalyst 2

n = 10, x = 81, s = 5

See attached photo for the construction of the confidence interval...