T= # of rental hours
Reservation Fee= $31
Per Hour Fee= $7.40
Multiply number of hours rented by the cost per hour, add that total to the reservation fee. The total needs to be less than $97.60.
Res Fee + ($ per hr * # hrs) < $97.60
$31 + $7.40t < $97.60
subtract 31 from both sides
7.40t < 66.60
divide both sides by 7.40
t < 9
ANSWER: To spend less than $97.60, they need to rent the room less than 9 hours.
Hope this helps! :)
Answer:
No ,not anything ,hahahahaha
Its a 50%-50% chance that you will be able to pick a red and blue marble without noticing....
C(3) = -0.09(3)² + 3.5(3) + 8
= -0.09 * 9 + 10.5 + 8
= -0.81 + 18.5
= 17.69 parts per million
