Property contains 10 acres. howmany lots ofnot less than 50ft x 100 ft. can be subdivided from the property if $26000sqft was roads?

Plz which expression is equivalent to the expression below?

Can't gugys answer the ratio question. this is urgent the plans of a building is drawn toward scale of 1: 1000. kfc the foyer on the plans measures 62mm by 54mm, how large is the foyer in real life?

How do you use the elimination method for this question? explain, because i really want to understand!