The following are the ages (years) of 5 people in a room: 23, 13, 17, 12, 15 A person enters the room. The mean age of the 6 people is now 22. What is the age of the person who entered the room?

A company offering short term loans agrees to lend Nick $1,200. The amount (plus interest) is repayable in one year, and the interest rate is 12% per month.

How do you estimate21 * 78

600 feet of fence surround a rectangular playground that is 100 feet wide. How long is the playground? A. 400 b. 500 c. 300 d. 200

Evaluate this exponential expression. 3,125 25 10

How do you add 2 and 2 to make 4

Solve for x. x/9 = 14 (A) 126 (B) 130 (C) 139 (D) 146

A copiy machine can duplicate 2400 copies in one hour. How many copies can it make in 5 hours?

Write $1.50 to $2.50 as a fraction in simplest form

A study of college graduates involves three variables: income level, job satisfaction, and one-way commute times to work. List some ways the variables might be confounded. a.) People with long commutes will have very high incomes. b.

What is 10.31 as a mixed number