A car passes the starting line traveling 20.5 mph. It accelerates constantly at 7.96 mi/hr-s. After 7.67 seconds, how far has the car travelled?
Be sure to give your answer in miles with the correct number of significant digits.
The answer should be in the scientific notation form of:
A×10^B
d = Vi t + (1/2) a t^2
= 20.5 mi/hr * 7.67 s + .5(7.96 mi/hr-s)(7.67^2 s^2)
= [20.5(7.96) +.5(7.96)(7.67^2)]mi s/hr
* (1 hr/3600s)
=
[20.5(7.96)+.5(7.96)7.67^2)]/3600 miles