My father gave me (a) a pair of binoculars (b) on my birthday. (c) No error. (d)
Identify the part of the sentence that contains an error: "Neither the manager nor the employees ___ willing to accept the new policy."
A particle is moving in a straight line. The variation of position $ x $ as a function of time $ t $ is given as: $ x = t^3 - 6t^2 + 20t + 15 $. The velocity of the body when its acceleration becomes zero is: