Work out the value of each expression, when r= 2.5 and t = 6. a) 4 (t - r)
b) 4t - r
c) 2(3t - 10)
d) (t - 2) ²
e) t
- + 4r - 3
3
f) 6r+t
——
3

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.