PLEASE HELP
On average, the chances if two right-handed parents having a left-handed child are 10%. If Joan and her husband are both right-handed, what is the probability that both of their children will also be right-handed? Draw a tree diagram to find your answer

Katlyn made 4 dresses with 7 yards of fabric. how many yards did she use on 1 dress?

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!

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?