At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga.
Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus.
Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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equation i used was Xf= Xi +Vit+ (1/2)at^2

Is 291.9 the distance the car travels in seven seconds?

yea

Looks good. Double check that you used the correct solution to the quadratic.

Maybe its just a typo in the solution manual......it has 23.8s

The math gods seem to agree. http://www.wolframalpha.com/input/?i=0.5*3.75*%28t-7%29%5E2+%3D+41.7*t

I get 27.833 s.

Can you double check the data (speed, acceleration, 7 seconds, etc.)

Note that the clock starts when the police car moves, which is t=7 in eashmore's equation.

yea data is correct.......since the police car moves 7 seconds later i have cars position as t+7

ok, thanks a lot

Guess the answer key has a typo!