A manufacturer of microcomputers estimates that 't' months from now it will sell 'x' thousand units of its main line of microcomputers per month, where x = 0.05t 2 + 2t + 5. The profit P from manufacturing and selling 'x' thousand units is estimated to be P= 0.001x 2 + 0.1x - 0.25 million dollars. Find time rate of change of profit. O 0.002x + 0.1 O 0.10t + 2 O 0.002(0.05t 2 + 2t + 5) O none of the given options