The error is that he probably forgot the decimal point thus causing him to say '"hundred" instead of "and" for the decimal point.
Answer: Gear B turns 90 times when gear A turns 60 times
Step-by-step explanation: To solve this you just 30x3=90
Answer: No; Most students have a curfew of 9 pm or earlier
It is A. Let me know if the answer is correct! :)
