a local park is rectangular in shape and had a length of 210 yards and width of 105 yards . what is the length of diagonal of the park . round your answer to the nearest hundredth of a yard

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