A painter can paint a house in 3 days. When his helper works with him, both men can paint the house in 2 days. How[..]

A farmer can plow a field in 12 hours by using one tractor. His son, using a different tractor, can plow it in 10[..]

The percentage of homes with digital TV services stood at 5% at the beginning of 1990 (t=0) and was projected to[..]

One person can do a certain job in ten minutes, and another person can do the same job in fifteen minutes. How many[..]

Suppose you are at the gas station filling your tank with gas. the function c(g) represents the cost of filling up[..]

two people start walking at the same time in the same direction. One person walks at 4 mph and the other person[..]

If 3 street sweepers can finish a certain job in 1 hr and 15 min, how long will it take 5 sweepers to finish the job?

The surface area A of a cube varies directly as the square of the length e of the edge of the cube. If the area is[..]

if d varies jointly as e and l. If d = 2.4, when e = 0.6 and l = 0.8, find d when e = 1.6 and l = .01.

The amount of gasoline used by a car varies jointly as the distance traveled and the square root of the speed.[..]