In some countries, the electricity running to a home oscillates between –240 volts to 240 volts, with a frequency of 90 cycles per second.

For the equation below, x is the input and y is the output. y = -4x + 3 if the input is -8, then the output is

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

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?