The instructions on the ortho weed-b-gon lawn killer indicate that to cover 1000 square feet (ft2) of lawn, 20 teaspoons (tsp) of the weed killer should be mixed in 5 gallons (gal) of water. ron haines wishes to spray his lawn with the weed killer using his pressurized sprayer. a) how much weed killer should be mixed with 8 gal of water to get a solution of the proper strength? also a) how much weed killer is needed to cover an area of 2820 ft2 of lawn?