Alex determined that his average speed when he commuted to work is 35 miles per hour. What conversion factor can be used to convert this speed to feet per hour?
1 mile
5,280 feet
1 hour
5,280 feet
5,280 feet
1 mile
5,280 feet
1 hour

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.