Asales clerk wants to predict the shoe sizes that will be sold this weekend for a new shoe that is going on sale. she uses her computer to simulate the first 15 customers who purchase the shoe. based on the simulated results, what is the probability that a randomly selected customer will purchase a shoe size less than a size 7.5?

Consider the function f left parenthesis x right parenthesis equals 4 x squared minus 3 x minus 1f(x)=4x2−3x−1 and complete parts (a) through (c). (a) find f left parenthesis a plus h right parenthesis f(a+h); (b) find startfraction f left parenthesis a plus h right parenthesis minus f left parenthesis a right parenthesis over h endfraction f(a+h)−f(a) h; (c) find the instantaneous rate of change of f when aequals=77.