The usual toll charge to use the Bingham tunnel is 50 cents. If you purchase a special sticker for $5.50, the toll is only 35 cents. At least how many trips through the tunnel are needed before the sticker costs less than paying for each trip separately?
37

Question

The usual toll charge to use the Bingham tunnel is 50 cents.  If you purchase a special sticker for $5.50, the toll is only 35 cents.  At least how many trips through the tunnel are needed before the sticker costs less than paying for each trip separately?
	37

anonymous · Answer

Correct.

your savings is $0.15 per trip. savings per trip times number of trips equals total savings. total savings equals cost of sticker when : $0.15x = $5.50. x = 36.6666666...

So on your 37th trip through the tunnel, the sticker starts costing less.

anonymous · Answer

thanks!