3times a number is 42 what is the number?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

What does independent variable and dependent variable mean in math?

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?