117% of a number doubled is 20. What is the original number?
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You take the derivative of the position equation s(t) = -3 + 4
and you get v(t) = 8t
now plug in 5
v(5) = 40
40 m/s is your answer
and you get v(t) = 8t
now plug in 5
v(5) = 40
40 m/s is your answer