86.60 rounded to the nearest dollar would be 87 dollars
(a)

= 400
(b)


(c) Only the positive solution makes sense because you cannot have a negative side length.
(d) Since one side of the painting is 20 inches, all four sides together will be 20*4 = 80 inches
There are 51,191 employees working in the second phase
The production floor has a total number of 73210 employees that work in 2 phases
22,019 employees work in phase one
The number of employees that work in phase one can be calculated as follows
= 73,210-22019
= 51,191
Hence 51,191 employees work in the second phase
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which angle are you trying to find?