Mr. ferro drove for 3.5 hours at 60 miles per hour, then for a certain time at 45 miles per hour. he traveled 300 miles in all. how much time did mr. ferro spend driving at 45 miles per hour? vicente decided to let h represent the number of hours mr. ferro spent driving at 45 miles per hour. which problem-solving step was this? a. come to an answer. b. gather your resources. c. check your answer and present the solution. d. understand the problem.