Answer:
Hope this helps. Let me know if it doesn't and I'll try to help out. :)
Using
(n-2)180 = 18001800
(n-2) = 18001800÷180
n-2 = 100010
n = 100010+2
n= 100012 sides
If you're talking about #3, then the equation would be 10+12.50h=5+15h.
h will equal 2, and the cost for that number of hours would then be $35.
Side 1: 17 Cm.
Side 2: 7 Cm.
Side 3: 14 Cm.
Hope This Helped.
The one that is filled the less would be the garbage can because the truck would get filled even more.