Which lines do you draw to find the center of a circle inscribed in a triangle

Suppose a store sells an average of 80 cases of soda per day. assume that each case contains 24 cans of soda and that the store is open 10 hours per day. find the average number of soda that the store sells per hour.

What is the factor form of x^2-9x+14

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)