4^5 x 4^-7 divided by 4^-2

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

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?