Acustomer's monthly water bill was $75.74. due to a rate increase, her monthly bill now $79.86. to the nearest tenth of a percent, by what percent did the amount of the customer's water bill increase? a) 4.1% b) 5.1% c) 5.2% d) 5.4%

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.