Min is building a ramp from the ground to her front doorstep. The top of the doorstep is 3.5 ft above the ground, and the ramp is 9.5 ft long. How far will the ramp extend from the house?+=
A.7.28
B.6.74
C.12.55
D.8.83

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