An arrow is shot upward with an initial velocity of 64ft/s. The height of the arrow h(t), in terms of the time the[..]

there are 50 grams of curium-245 which has a half-lige of 9300 years. how many grams will remain after 46500 years

Julie and Eric row their boat (at a constant speed) 27 miles downstream for 3 hours, helped by the current. Rowing[..]

John has 50 marbles which are red, blue or yellow. Thirty-five of the marbles are either red or blue, and forty of[..]

Paul bought one ball for each boy and one top for each girl in his class. He paid $311 to buy these items for the 20[..]

200 people made a New Years resolution to improve their fitness. Some intended to run, some to swim, and the others[..]

A number is multiplied by -3. and then the product is decreased by 7. The result is 4 less than twice the opposite[..]

If twice the opposite of a number is increased by 5. the result is the opposite of the number. What is the number?

Find three consecutive odd integers such that 7 times the sum of the first and the third is 120 less than 10 times[..]

Find three consecutive even integers such that 6 times the sum of the first and the third is 8 less than 14 times[..]