A rock is dropped from a height of 92 ft. Its height (in feet) above ground t seconds later (where 0 ? t ? 3) is given by s(t) = -10t² + 92. Find the average velocity PART A. [1 MARK]. Write the average velocity formula from the textbook. PART B. [2 MARKS]. Use it to compute the average velocity of the rock over the given time intervals. Round your answers to 4 decimal places (meaning, 4 numbers must appear after the decimal.) (1) [1.999, 2] (II) [2, 2.001] PART C. [1 MARK]. Using the previous part, estimate the instantaneous velocity when t = 2. TENT

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A rock is dropped from a height of

92 ft

. Its height (in feet) above ground

t

seconds later (where

0 ? t ? 3

) is given by

s (t) = ? 10 t^{2} + 92

. Find the average velocity PART A. [1 MARK]. Write the average velocity formula from the textbook. PART B. [2 MARKS]. Use it to compute the average velocity of the rock over the given time intervals. Round your answers to 4 decimal places (meaning, 4 numbers must appear after the decimal.) (1)

[1.999, 2]

(II)

[2, 2.001]

PART C. [1 MARK]. Using the previous part, estimate the instantaneous velocity when

t = 2

.

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