Abase ball diamond is square. the distance from home plate to first base is 90 feet. in feet, what is the distance from home plate to second base?

Multiply. write your answer in simplest form. 3/8 x 5/7

If 30 lb of rice and 30 lb of potatoes cost ? $27.60? , and 20 lb of rice and 12 lb of potatoes cost ? $15.04? , how much will 10 lb of rice and 50 lb of potatoes? cost?

Prove that 16^4-2^13-4^5 is divisible by 11.