Jeffery works 45 hours the 1st and 2nd week of september and 36 hours the third week. if he makes $18 an hour, how many did he make after the three weeks of working?

Use the graph of the sine function y=2sinθ shown below

How to do this , and can some one explain

The number of chocolate chips in a bag of chocolate chip cookies is approximately normally distributed with a mean of 12611261 chips and a standard deviation of 118118 chips. (a) determine the 2626th percentile for the number of chocolate chips in a bag. (b) determine the number of chocolate chips in a bag that make up the middle 9696% of bags. (c) what is the interquartile range of the number of chocolate chips in a bag of chocolate chip cookies?