Finding arc length

[megr_ftw]

1. The problem statement, all variables and given/known data
Find the arc length of r(t)= <10sqrt(2), e^10t, e^-10t>, 0 <_ t <_ 1.
<_ is greater than or equal to.


2. Relevant equations

arc length= integral(magnitude of the derivative of r(t))

3. The attempt at a solution

i thought I figured the answer out and got an arc length of 31149.3, but my online homework is telling me this is the wrong answer. Im not sure what im doing wrong.

[Mark44]

We can't tell you what you did wrong if we can't see your work. Please show us what you got for r'(t) and |r'(t)|.