Posted by saud on Sunday, December 4, 2011 at 6:23pm.
A factory produces bicycles at a rate of 80+0.3t^2−1.1t bicycles per week (t in weeks). How many bicycles were produced from day 15 to 21?

math  Steve, Monday, December 5, 2011 at 10:33am
Intgerate (.3t^2  1.1t + 80) dt from 15 to 21
= .1t^3  .55t^2 + 80t [12,15]
= 1413  1063
= 360

math  Kat, Monday, April 30, 2012 at 8:44pm
Very useful thanks!
for mine I had 8 to 28 days, and my rate was different. I just typed: 0 to 3 integral 105+02t^2−09t into wolfram alpha and got 312 bicycles.
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