Explica como se tiene la raiz cuadrada de un monomio ejemplifica ​

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?

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

What multiplys to be 1 but adds up to be 4