The Position S of a Point (In Feet)is Given as a Function

Multiple Choice

The position s of a point (in feet) is given as a function of time (in seconds) . a. Find its acceleration as a function of . b. Find its acceleration at the specified time.

A) a ( t ) = 20 ft/sec², a ( t = 2) = 20 ft/sec²
B) a ( t ) = -20 ft/sec², a ( t = 2) = -20 ft/sec²
C) a ( t ) = 24 ft/sec², a ( t = 2) = -24 ft/sec²
D) a ( t ) = -2 ft/sec², a ( t = 2) = 2 ft/sec²
E) a ( t ) = 5 ft/sec², a ( t = 2) = 5 ft/sec²