6.5 HW Q11I need help on my Homework

Sociologists have found that crime rates are influenced by temperature. In a town of 100,000 people, the crime rate has been approximated as C = -(T -60)2 + 120, where C is the number of crimes per month and T is the average monthly temperature in degrees Fahrenheit. The average temperature for May was 71 and by the end of May the temperature was rising at the rate of 9 per month. How fast is the crime rate rising at the end of May? At the end of May, the crime rate is rising by |crime(s) per month. (Simplify your answer.)