If you havent learnt Sin, Cos yet, let me know, so we can try the other solutions.
The GCF of 180 and 240 is 60
The result of the product of (0.36) and (0.53) is 0.1908
<h3>How to determine the product</h3>
The product expression is given as:
(0.36) * (0.53)
Rewrite the product as follows:

Expand the product

Expand

Evaluate the sum

See attachment for the area diagram of the product
Read more about products at:
brainly.com/question/10873737
Been a bit since i’ve done this kind of problem.
X+4=20
X is the number of hours needed to work, while 4 is the hours already there.