R(t) = integral of r'(t) = integral of ti + e^tj + te^tk = 1/2t^2i + e^tj + (te^t - e^t)k + c
r(0) = j - k + c = i + j + k
c = i + 2k
Therefore, r(t) = (1/2t^2 + 1)i + e^tj + (te^t - e^t + 2)k
Answer:Exact Form: one over 9
1
9
Step-by-step explanation: ,..
First you have to set up your equation. 5x+80 and x+15.
Let x be the number of square feet to be mowed
215 square feet take 22 minutes
x square feet take 12 minutes