An icicle drips at a rate that can be represented by the function f (x) = - x2 + 8x - 7, where 0 ≤ x ≤ 10 and x is the number of hours after the sun has risen. When f (x) is a negative number, the icicle is not dripping. Determine the values when the icicle starts and stops dripping.

A) x = - 1 and x = 7

B) x = 1 and x = 7

C) x = 1 and x = - 7

D) x = - 1 and x = - 7

Question

1 April, 11:44

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Answers (2)

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Deangelo Rivera · Answer 1

Deangelo Rivera 1 April, 11:50

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Answer: B) x = 1 and x = 7

Damien Montoya · Answer 2

B) x = 1 and x = 7