The length of time, L hours, that a phone will work before it needs charging is normally distributed with a mean of 100 hours and a standard deviation of 15 hours. Find the probability that a randomly selected phone will work greater than 127 hours before it needs charging.

Solve for x

Solve for the value of x

Solve for x 152 60

denise does a 15 mi workout each day of training. she bicycles part of the distance & runs the other. Her average cycling speed is 20 mi/h, & her average running speed is 5 mi/h. Let x represent the time she spent cycling & let y represent the time spent running. Copy this table and fill each cell w/ an expression for the distance described. Write an equation to represent Denise's workout. distance denise cycles distamce denise runs total distance