With the curve

parameterized by

with

, and given the vector field

the work done by

on a particle moving on along

is given by the line integral

where

The integral is then


The answer is 873 hope this will help you.
1.) 4.358898944
2.) 7.071067812
The normal rule to remember is 68-95-99.7, i.e. plus or minus three sigma corresponds to 99.7% of the probability. That leaves 0.3% in the two tails, or 0.15% in the tail above 3 sigma.
Answer: 0.15%
Divide $71,000 by 24 because there are 12 months in a year and he gets paid 2 times a month. I got $2,958.33