5. Ken asked a friend to rent him a game and as a joke, the friend rented one that he didn't think Ken would like. He was right. So Ken paid his friend the rental cost of $6.15 (including taxes), but
he paid him using only nickels ($0.05) and dimes ($0.10). If there were 3 more dimes than
nickels, how many of each coin did Ken give his friend? (5 marks)

If 20% of a number is 35, what is 50% of that number?

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?

Extra points! find the missing dimension! need asap