Can someone give me the answers? i'm sorry to ask but i don't have the time ; -;

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices