Question

Am i doing this correctly:

Answer 1

A force of 35 pounds exerted at an angle of 15 degrees above the horizontal is required to slide a desk across a floor. The desk is dragged 8 feet. Determine the work done in sliding the desk and state whether you used the projection form or dot product form for work. Round to two decimal places.

Answer 2

Now that i think about it i have no clue how to do this

Answer 3

Using trig i found the hypotenuse to be about 8.2822094432806643951647628039696 which at the given force would be about 289.87733051482325383076669813893 foot pounds, correct?

Answer 4

Thats not one of the answers, what did I do wrong,