Solve the problem. 50) The rate at which an assembly line worker's efficiency E (expressed as a percent) changes with respect to time t is given by E'(t) =75 - 6t, where t is the number of hours since the worker's shift began. Assuming that E(1) = 92, find E(t). A) E(t) =75t - 3+2 + 92 B) E(t) = 75t - 3t2 + 20 C) E(t) = 75t - 6t2 + 20 D) E(t) = 75t - 3+2 + 164