Flora made 7 withdrawals of $75 each from her bank account. what was the overall change in her account?

How to do this , and can some one explain

Pranza plotted point a in the coordinate plane below.

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