Evaluate if b=-2 and C=4 to the nearest tenth

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

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.

What is the ratio fraction form of 25: 9