4+ [(16 - 4) + (12 -9)] also explain the answer and you

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.

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.