Answer:
11 m/s; 2 m/sec²
Explanation:
v(t) = s'(t) = 2t +3
v(4) = 2·4 +3 = 11 . . . m/s
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a(t) = v'(t) = 2 . . . . m/s²
Velocity and acceleration are 11 m/s and 2 m/s².
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