Final answer:
Edoardo has 9/10 hours or 54 minutes to finish his homework consisting of 4 1/2 or 9/2 problems, resulting in 12 minutes per problem. The correct answer is A) 12 mins.
Step-by-step explanation:
The question is asking for the amount of time Edoardo takes to complete each problem of his homework if he has 9/10 hours to finish 4 1/2 problems. To find out how long it takes to complete one problem, we first convert 9/10 hours into minutes by multiplying by 60 (the number of minutes in an hour). 9/10 hours equals 54 minutes. Since Edoardo has 4 1/2 problems, we convert 4 1/2 into an improper fraction, which is 9/2. Now we divide the total number of minutes (54) by the number of problems (9/2).
When we calculate this, we get 54 / (9/2) = 54 * (2/9) = 12. Therefore, it takes Edoardo 12 minutes to complete one problem. The correct answer is A) 12 mins.