How many 2-letter combinations can be made from the letters a, b, c, and d? a. 4 c. 8 b. 6 d. 12

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Including 6% sales tax, an inn charges $135.68 per night. find the inns nightly cost

32a³b² 8ab² simplify the following expression.