Jerry and tom are siding a house. jerry can paint the house in 2 days less time than tom. together they can do the job in 5 days. how long will it take each of them if they work alone? give your answer to the nearest tenth.

Aliter of water contains about 3.35 x 10^25 molecules. a certain river discharges about 2.9x 10^8 l of water every second. about how many molecules does the river discharge every minute? write your answer in scientific notation