A population of beetles are growing according to a linear growth model. The initial population (week 0) is P0=9

and the population after 5 weeks is
P5=44
.

Find an explicit formula for the beetle population after
n weeks.

Pn=

After how many weeks will the beetle population reach 177?

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.