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Solve the Problem f(t)=4+130t4.9t2\mathrm { f } ( \mathrm { t } ) = 4 + 130 \mathrm { t } - 4.9 \mathrm { t } ^ { 2 }

question 34

Multiple Choice

Solve the problem.
-An arrow is shot straight up from level ground. The distance (in meters) of the arrow above the ground (the position function) is f(t) =4+130t4.9t2\mathrm { f } ( \mathrm { t } ) = 4 + 130 \mathrm { t } - 4.9 \mathrm { t } ^ { 2 } at any time t\mathrm { t } (in sec) . Find f(1) \mathrm { f } ^ { \prime } ( 1 ) and the initial velocity of the arrow.


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