A Person's Blood Pressure P at Time T Is Given $\frac { 7 \pi t } { 3 }$

Short Answer

A person's blood pressure P at time t is given by P(t) = 90 + 30 sin $\frac { 7 \pi t } { 3 }$ , where t is measured in seconds. What is the average blood pressure over a time interval of 60 seconds?
Enter just an integer (no units).