The position of an object moving in a straight line is given by the equation x = (3t3 + 7t + 5) m, where t is in seconds. What is the object’s acceleration at time t = 5 seconds?
A、415 m/s2 ;
B、232 m/s2 ;
C、 90 m/s2 ;
D、35 m/s2
发布时间：2025-07-26 00:52:34
