Your answer should be, 3x= 22y to the tenth power...
To produce 5 guns they lose 5 butter so I think opportunity cost of one gun would be one butter.
X= [tex] \sqrt{35} is the answer
In first 40 hours he earns = 7.30 x 40 = $292
Each hour after his rate = 7.20 x 1.5 = $10.80 per hour
In extra four hours he earns = 10.80 x 4 = $43.20
Total earnings = $292 + $43.20 = $335.20
Therefore you don't agree
Hoped this helped you