Arandomly selected customer support wait time (from a normal distribution) is calculated to be 1.8 standard deviations above its mean. what is the probability that another randomly selected customer wait time from the distribution will be less than 1.8 standard deviations from the mean?

a) 0.9641

b) 0.9976

c) 0.9281

d) 0.0359

If x=-3 is the only x-intercept of the graph of a quadratic equation, which statement best discribes the discriminant of the equation?

Find the condition that the zeros of the polynomial f(x) = x^3+3px^2+3px+r may be in a.p.

Grace is standing 18 feet from a lighthouse and kelly is standing 10 feet from grace. the angle that grace looks up to see the top of the lighthouse is 45°. the angle that kelly looks up to see the top of the lighthouse is y°. find the height, h, of the lighthouse. find the angle, rounded to the nearest tenth of a degree, in which kelly looks up to the top of the lighthouse. to the nearest tenth of a degree, find the value of x° . in two or more sentences, explain your calculations