SOLUTION: distance traveled by an object moving in a straight line is given by s = t^2 + 8t, where s is in ft. and t is the time in seconds has been in motion. How long (to the nearest tenth

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: distance traveled by an object moving in a straight line is given by s = t^2 + 8t, where s is in ft. and t is the time in seconds has been in motion. How long (to the nearest tenth      Log On


   

Question 311949: distance traveled by an object moving in a straight line is given by s = t^2 + 8t, where s is in ft. and t is the time in seconds has been in motion. How long (to the nearest tenth) will it take the object to move 9 ft. Please show your work, i am having a really hard time getting this!
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
s+=+t%5E2+%2B+8t
s+=+9 ft
9+=+t%5E2+%2B+8t
t%5E2+%2B+8t+-+9+=+0
%28t+-+1%29%28t+%2B+9%29+=+0
t+=+1 (can't use negative answer)
It will take 1 sec for the object to move 9 ft