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?

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.