According to records of commonwealth edison, monthly electric consumption for january follows a normal distribution with a mean of 1,650 kilowatt hours, and a standard deviation of 320 kilowatt hours. commonwealth edison wants to identify its heaviest users, which are those that are in the top 6% of electric consumption. how many kilowatt hours in january would qualify for the heavy user classification?

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".

The force it would take to accelerate an 900-kg car at the rate of 6m/s2

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?