13 feet in 5 steps round to the nearest hundredth

Rewrite the hyperbolic equation 4y^2 -9x^2 +54x-8y-113=0

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?

If i have 20$ and i gave 5$ away how much i got