.) (5 points) Evaluate -- [10 (-0.30) – 15.73-804 &) (5 points) Winnie has twice as many contacts in his phone as Samuel. Belinda has 8 more than number of contacts that Samuel has. Samuel has 36 contact in his phone. How many contact do the have altogether?

Me because some of question i don’t understand

Mrs. gehrke said cheddar weighs 16.8 pounds. he actually weighs 15.2 pounds. what is the percent error?

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.