Investors buy a studio apartment for $200,000. Of this amount, they have a down payment of $40,000. Their down payment is what percent of the purchase price? What percent of the purchase price would an $800,000 down payment be?

How many real and imaginary solutions does the equation x^2-3x=-2x-7 have?

The volume of a cube is 8 in to the 3rd power. how long is each side?

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?