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Students in a seventh-grade class were given an exam. During the next 2 years, the same...

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Basic Math

Students in a seventh-grade class were given an exam. During thenext 2 years, the same students were retested several times. Theaverage score g can be approximated by the model

g(t) = 81 − 13 log10(t + 1),    0≤ t ≤ 24

where t is the time (in months).

(a) What was the average score on the original exam? ???


(b) What was the average score after 6 months? (Round your answerto one decimal place.) ???


(c) When did the average score drop below 70? (Round your answer tothe nearest month.)

The average score dropped below 70 after ??? months.

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