The students in Natalie's grade voted to select a guest speaker. 80% of the students voted for a famous athlete. If there are 90 students in Natalie's grade, how many students voted for the athlete? I need this ASAP Im giving a lot of point more than I should.

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

Use the data on the dot plot to answer the question.how many people read for more than three hours last week? i'm on a unit test review

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.