SOLUTION: 6. The test scores in MRs. Kaste's MAth B class are normally distributed with a mean of 85 and a standard deviation of 5. Between what two scores would 95.4 percent of the scores f

Question 173129This question is from textbook Amsco's Perparing for the Regents Examination Mathematics B
: 6. The test scores in MRs. Kaste's MAth B class are normally distributed with a mean of 85 and a standard deviation of 5. Between what two scores would 95.4 percent of the scores fall?
1) 70-100 2) 75-95 3) 80-90 4) 85-90
7. The heights of the tides at Jones Beach, NY, are a function of the time of day. THe time from one high tide to another is approximately 12 hours. Which of the following types of functions would best model this situation?
1) exponential 2) linear 3) logarithmic 4) trigonometric

Show work, thanks alot !!!!This question is from textbook Amsco's Perparing for the Regents Examination Mathematics B

Answer by stanbon(48558) (Show Source):
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6. The test scores in MRs. Kaste's MAth B class are normally distributed with a mean of 85 and a standard deviation of 5. Between what two scores would 95.4 percent of the scores fall?
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Ans: between 2 standard deviations to the left of the mean and 2 standard
deviations to the right of the mean.
85-2*5 = 75 ; 85+2*5 = 95
1) 70-100 2) 75-95 3) 80-90 4) 85-90
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7. The heights of the tides at Jones Beach, NY, are a function of the time of day. THe time from one high tide to another is approximately 12 hours. Which of the following types of functions would best model this situation?
1) exponential 2) linear 3) logarithmic 4) trigonometric
Ans: trigonometric: the time between the two high tides is the period of
the function. That period repeats and repeats.
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Cheers,
Stan H.