Cody saves all his nickels. he finds he has 360 nickels. it takes 40 nickels to fill each paper wrapper and make a roll. how many manynwrappers does he need? write an equation using n for the unknown number. find the number of wrappers needed.

Combined megan and kelly worked 60 hours. kelly worked twice as many hours as megan. how many hours did they each worked?

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

4+(2+x) can you me solve this problem