Your friend’s boss manufactures Styrofoam cups and has given your friend the assignment of determining the height for a box that will hold a stack of 100 cups. Your friend has a few of the cups, but he has no idea of how he can figure out the height of a stack of 100 of them. He has started measuring stacks of cups. He has measured one cup and found that it was 3 1/2 inches high. Two cups are 4 inches high, and three cups are 4 1/2 inches high. c. Write an equation to represent the problem for any number of cups.