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Suppose the rate of change of rainfall, measured in inches per hour, is represented by the following function, where t is the number of hours and 0 ≤ t ≤ 8.

R of t equals negative t squared plus 6 times t plus 1 for t less than or equal to 5 and t plus 7 all over 2 for t is greater than 5

What is R′(4)? (6 points)

A. −2 in/hr

B. −2 in/hr2

C. 9 in/hr

D. 9 in/hr2

Suppose the rate of change of rainfall measured in inches per hour is represented by the following function where t is the number of hours and 0 t 8 R of t equa class=

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