The student went wrong in step three. the solutions should have been -3 and 5
Answer:
300 doors.
Step-by-step explanation:
1.5 minutes for 1 door.
7.5 hours for 300 doors.
7.5 hours = 450 minutes.

Answer:
A
Step-by-step explanation:
It resluts in 4
The answer you seek is 0.75, my friend.