Aaron has a collection of American coins. He has three times as many 10 cent coins as 25 cent coins, and has some 5 cent coins as well. If he has 88 coins with total value of 11.40$, how many of each type does he have?​

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Need on this one asap im almost done with this subject

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?