The circle graph below represents the percent each expense is of the total cost of a sport. If the total cost was $489, what was spent on equipment?
30% Equipment
16% Transportation
54% Fees
O $140.90
O $135.78
O $146.70
O $129 80

the 3rd on is correct

step-by-step explanation:

we have three similar triangles, because each has a right angle and shares an angle.   let's write the angles in order: opposite to short leg, long leg, hypotenuse.

cab similar to bad similar to cbd

or as ratios,

ca: ab: cb = ba: ad: bd = cb: bd: cd

we also know

ac = ad + cd

(ad+cd): ab: cb = ba: ad: bd = cb: bd: cd

(ad+cd)/cb=cb/cd

we have cb=6, ad=5 and seek x=cd.

we reject the negative root and conclude x=4

answer: 4

c > -10.55

step-by-step explanation: