Which expression can be used to find the value of x?

• (sin 29°)(sin 42°)

9

• 9(sin 42°)

sin 29°

• 9(sin 29°)(sin 42°)

• 9(sin 29°)

sin 42°

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.

The u-drive rent-a-truck company plans to spend $13 million on 320 new vehicles. each commercial van will cost $25 comma 000, each small truck $50 comma 000, and each large truck  $80 comma 000. past experience shows that they need twice as many vans as small trucks. how many of each type of vehicle can they buy?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup