Calvin's rug covers 1/8 of the floor space in his bedroom. how much floor space would be covered if calvin had 4 rugs of that size? write the simplest form

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