Mason wants to host a housewarming party. The following equation represents how the cost of party depends on the number of attendees. The equation is d= 16a
​The variable \mathrm{a}a represents the number of attendees, and the variable d represents the cost in dollars.

Find the number of attendees who could be invited if Mason budgets a total of $80 for his party.

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.