Ross drove 300 miles at r miles per hour and 360 miles at r+10 miles per hour. if the time needed to drive 300 miles was equal to the time needed to drive 360 miles, find the rates at which ross drove (express the time needed for each part of the trip as t=d/r)

The human resources manager at a company records the length, in hours, of one shift at work, x. he creates the probability distribution below. what is the probability that a worker chosen at random works at least 8 hours? probability distribution px(x) 6 hours 7 hours 8 hours 9 hours 10 hours 0.62 0.78 пол