the shaw family is building a patio. one person can place the flagstone at a rate of 4.5 per hour….

the shaw family is building a patio. one person can place the flagstone at a rate of 4.5 per hour. the equation s=11h represents the number of stones s that two people can place in h hours. how many more flagstones can 2 people place in 3 hours than one person?