Hong went for a drive in his new car. He drove for 2 hours at a speed of 51.2 miles per hour. For how many miles did he drive?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.