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bixtya [17]
3 years ago
13

Last year Betty's annual salary was $42000. This year she received a raise and now eams $46500. On a weekly basis, how much more

does Betty earn?
Mathematics
1 answer:
bearhunter [10]3 years ago
3 0

Answer:

About 87$

Step-by-step explanation:

Yu take both salary amounts an divide by 52 since there are 52 weeks in a year and then find the difference between them

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How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 95% confidence that
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Answer:

61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.                

Step-by-step explanation:

Given : We want 95% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 12 minutes.

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Solution :

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Squaring both side,

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6 0
3 years ago
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