Answer:
3/250 gallons per square yard
Explanation:
To find gallons per square yard, divide gallons by square yards.
Chantel used (3 tanks)×(3/4 gallon/tank) = (9/4 gallons).
Her backyard area is (12 1/2 yd)×(15 yd) = 187 1/2 yd².
The rate of application was ...
(9/4 gallons)/(375/2 yd²) = 3/250 gallons/yd² = 0.012 gallons/yd²