Unit 5 Mock Assessment 1. Differentiate f(x) = Vezx Do not simplify. Do not factor. You may have negative exponent(s) in final answer. [K3] 2. The sales of a new high-tech item are given by S(t) = 108 - 80e-0.at where t represents time in years. Find the rate of change of sales after 1 year. [A2] 3. Given the function d(t) = (3t)3* [A4] a) Determine the minimum value. b) Determine the interval of decrease. Express in interval notation