The volume in a water tank can be modeled by the function V (t) = -2t^2 + 5t + 7, where V is the volume in gallons and t is the time after 12: 00 pm on a particular day.

Explain how you would determine the volume of the tank at noon.

2. The rate at which snow fell on a particular day can be modeled by the following quadratic function. r = -3t^2 + 6t . Where r is the rate of the snow fell in cubic centimeters per hour and t is the time in hours.

a) determined the rate of the snow fell, to the nearest hundredth, after 30 minutes.

b) state the domain and range of the function

c) determine how many hours the snowfall rate is greater than 2.0cm^3/hour, to the nearest tenth?