$37.25 must be payed for the total time of 115 minutes.
Step-by-step explanation:
x be the total time spent in minutes,
It is given that the total time spent, x = 115 minutes.
To find the cost to pay for 115 minutes :
The first 45 minutes out of 115 minutes should be payed $12.75
Therefore, the remaining minutes is 115 - 45 = 70 minutes.
The additional 2 hours (120 minutes) should be payed $0.35 per minutes.
But, in this case the additional time is only 70 minutes.
⇒ 70 × 0.35
⇒ $24.5
The total amount to be payed for 115 minutes = $12.75 + $24.5
⇒ $37.25