Select all the correct answers. Which statements are true about the functions y=sin, y=cos(x) ,y=tan(x) and ?
1.The amplitudes of , , and are 1.
2.The periods of and are , and the period of is .
3.The domains of , , and are all real numbers.
4.The graphs of and do not have midlines.
5.Both and are increasing on the interval , and is decreasing on that interval

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?