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step-by-step explanation:
p
answer: -10
s(t) = 1 - 10t
s(x) = 1 - 10x
s(x + h) = 1 - 10(x + h)
= 1 - 10x - 10h
s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)
= 1 - 10x - 10h - 1 + 10x
= -10h
= -10