A window has the shape of a rectangle with a semicircle at the top. Find the approximate area of the window using the dimensions shown.

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

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.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.