You forgot to divide by 3.My answer for the average velocity is 5ft/s
I find rather 1.63and my answer for the second part is 1.60s and -1.60s.
moreover, time cannot be negative, so you have to keep the positive solution only;
This one I forgot to include with my previous question.
A particle moves along a line so that its position at any time t≥0 is given by the function s(t)=tł-8t+1, where s is measured in feet and t is measured in seconds.
Find the average velocity during the first 3 seconds, and at what values of t does the particle change direction?
My answer for the average velocity is 5ft/s, and my answer for the second part is 1.60s and -1.60s.
How close am I?