During high tide around 11:00 p. m., the water level is 3 feet above a marker on a pier. The following day, during low tide around 5:12 a. m., the water level has dropped 3 feet below the marker. The height of the water is modeled by the function y=3cos(24pi/149x) where x is the time in hours since 11:00 p. m. What is the height of the water at 2:15 a. m.?

A 0.22 feet below the marker

B 0.07 feet below the marker

C 1.26 feet above the marker

D 1.39 feet above the marker

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.