2( 1 − 4 r ) < − 2 ( r + 3 ) − 4 2(1-4r)< -2(r+3)-4 pplzzz

What is sin 7x/4 ? i need on this urgent trig

Is there an x intercept in the equation 60*1.15^x

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.