The diameter of an electric cable, Say X, is assumed to be continuous random variable with p. d.f
A. Show that f(x) is a p. d.f.

B. Determine a number b such that

C. Find the mean of X
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Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Enter the number of complex zeros for the polynomial function f(x) = x 4+ 5x² +6

You are a clerk at convenience store. a customer owes 11.69 for a bag of potatoes chips. she gives you a five dollar bill. how much change should the customer receive?