There are 180 pages in the book diana is reading. diana has read 90 pages. what percent of the book has she read?

Pranza plotted point a in the coordinate plane below.

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.

The perimeter of a quarter circle is 14.28 miles. what is the quarter circle's radius?