Answer: 3 hours
Step-by-step explanation:
If you add up 25+15=40 if you add up 40+15=55, 55+15=70, 70+15=85
Answer:
63
7, 14, 21, 28, 35, 42, 49, 56, 63, 70.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90.
A:63