how would you do this problem. i know the equation for av. velocity is

s2-s1/t2-t1. I keep getting -9.8

At a timetseconds after it is thrown up in the air, a tomato is at a height (in meters) off(t)=−4https://webwork3.math.luc.edu/webwor...144/char3A.png9t^2+60t+2 m.

What is the average velocity of the tomato during the first 5 seconds?