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January 28, 2015

January 28, 2015

Posted by **nico** on Sunday, November 25, 2012 at 2:30pm.

r(t)={ (600t)/(t+3), [0,5]

{1000e^(-0.2t), (5,infinity)

Is r continuous at t=5? Show work that lead to you answer.

- calculus -
**Steve**, Sunday, November 25, 2012 at 2:47pmat t=5,

600t/(t+3) = 3000/8 = 375

1000e^(-.2t) = 1000/e = 367.8

Actually, the computation isn't really necessary, since r(t) is rational at t=5, and e^x is irrational for any rational x.

- calculus -
**nico**, Sunday, November 25, 2012 at 3:39pmwhat does your answer mean exactly?

- calculus -
**Steve**, Sunday, November 25, 2012 at 8:27pmit means that the two piecewise functions don't have the same value at t=5, so r(t) cannot be continuous.

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