Answer:
D. The function is negative when x < 0 and when x>0
Step-by-step explanation:
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C, never negative
it can be zero in exactly one occasion
Answer: D = time *speed
A. 1/2 *4
B. 1/3*5 + 1/6*4
C. 1/4*6 + 1/4*5.5
D. 1/10*1 + 9/10* 6.5
