The usual toll charge over the bridge is $1.50. If you purchase a special sticker for
$10.50, the charge is only $0.80. At least how many trips over the bridge are
needed before the sticker would cost less than the toll charge?

Question

The usual toll charge over the bridge is $1.50. If you purchase a special sticker for
$10.50, the charge is only $0.80. At least how many trips over the bridge are
needed before the sticker would cost less than the toll charge?

kjsaif · Answer

14 crossings without the special sticker cost (14 x 1.5) = $21.00
14 crossings with the special sticker cost      (14 x 0.8) = $11.20 
Savings after 14 trips = ($21.00 - $11.20) =  $9.80
Still have not saved the $10.50 that bought you the cheaper crossings.

15 crossings without the special sticker cost (15 x 1.5) = $22.50
15 crossings with the special sticker cost      (15 x 0.8) = $12.00 
Savings after 15 trips = ($22.50 - $12.00) =  $10.50
15 trips have saved the $10.50 that bought you the cheaper crossings. 


~~al2006

likeabossssssss · Answer

$\Huge\color{#EB00FF}{\text{WELCOME}}$ $\Huge\color{blue}{\text{TO}}$ $\Huge\color{green}{\text{OPEN}}$$\Huge\color{purple }{\text{ STUDY!!!!!!!!!!!}}$ $\Huge\heartsuit$