Posted by Aletha on Sunday, March 18, 2007 at 6:51pm.

After t hours of an 8-hour trip the distance a car travels is modeled by:
D(t)= 10t + (5)/(1+t) - 5
where D(t) is measured in meters.

a) derive a formula for the velocity of the car.
b) how fast is the car moving at 6 hours?
c) derive a formula for the car's acceleration.

My answers:
a)(5)/(1+t)^2
b).102 meters (I KNOW this is wrong!)
c) ????
I just know my answers are wrong if someone could just tell me where I went wrong and how do you solve c).

v=d D/dt= 10 -5/(1+t)^2

acceleration is the first derivative of v, use the v above not yours.

Is b) correct?

Similar Questions
  1. Posted by winterWX on Monday, March 19, 2007 at 11:51pm.A 2600 kg truck traveling north at 38 km/hr turns east and accelerates
    1. answers icon 0 answers
  2. Thank you for your help.Posted by rfvv on Sunday, March 16, 2014 at 3:35pm. 1. What's she like? - She's really tall. 2. What's
    1. answers icon 1 answer
  3. http://www.jiskha.com/display.cgi?id=1169164297Posted by Ashley on Thursday, January 18, 2007 at 6:51pm. px+qy=r 2px-qy=2r find
    1. answers icon 0 answers
    1. answers icon 0 answers
more similar questions