The Coffee Spot has 20 pastries for sale, including 6 glazed donuts. What is the probability that a randomly selected pastry will be a glazed donut?

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.

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Two cities a and b are 1400km apart and lie on the same n-s line. the latitude of city a is 23 degrees. what is the latitude of city b. the radius of the earth is approximately 6400km.