7:

Sociologists have found that crime rates are influenced by temperature. In a town of 150,000 people, 1 the crime rate has been approximated as C = -(T -65)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 73 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.)