They can rent it for 7 hr. $20.60-$4.50=$16.10. $16.1 divided by $2.30= 7
Answer:
7, 16, 8, 27, 9, 38, 10, 49, 11
The probability can be modeled using the following formula:

wherein X follows the density

Now for k = 3 we get:
The probability we are looking for is 0.15.
Do you have any question ?
It is robbie bc i know him personally