1. The problem statement, all variables and given/known data A snow blower clears 300 cubic ft of snow per hour regardless of depth of snow. At some point before noon, it starts snowing and snows steadily all day. A man starts clearing a sidewalk with the snow blower at noon. He clears 200 feet in the first hour, and 100 feet in the second hour. When did it start snowing? 3. The attempt at a solution not too sure about this. the best i could come up with was dx/dt = x - H where x is the amount of snow in cubic feet and H is the amount of snow the blower clears. then i got stuck trying to separate variables and integrate. and i don't have an initial condition to get rid of the constant from integration, only two other conditions. how do i use these? any help is appreciated. thank you.