Which is the correct operation to use to solve this problem? the library has a total of 542 shelves. the average number of books on each shelf is 34. how many books does the library have if all the books are on the shelves? enter m for multiplication or d for division.

Classify the following triangle check all that apply

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.

Ijust need to see how to do this. so you don’t have to answer all of them just a step by step explanation of one.