A mail carrier can deliver to 36 houses and 30 minute mark one to determine how many houses the carrier can deliver mail to you in 7.5 minutes at this rate he thinks that to find an answer he should do the following first divide 36 houses by 30 minutes to find a unit rate of 1.2 houses per minute then multiply 1.2 houses per minute by 7.5 minutes to get nine houses which statement is correct