During each week of piano lessons, Jacob learns to play 2 new pieces. In all, how many weeks of piano lessons will Jacob need before he will be able to play a total of 28 pieces?

Evaluate the expression for the given value of the variable 7a - 4a for a =8

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?

How many ordered pairs of positive integers satisfy xy=32?