Factorise fully
x2 - 42^2

Iq scores for adults age 20 to 34 years are normally distributed according to n(120, 20). in what range does the middle 68% of people in this group score on the test?

The monetary value earned for selling goods or services to customers is called a.) revenue b.) assets c.) money d.) accounting

Which of the following is not a subset of {1,2,3}?