In a national survey of 6700 teens, 81% of teens between the ages of 12 and 17 said they use the Internet to e-mail friends or relatives. About how many teens is this? Explain your answer.

3 ten thousand + 14 tens + 16 ones

Skylar repairs microwaves. Her revenue equals R (h) = 80 + 30h dollars for every h hours she spends repairing microwaves. Her overhead cost equals C (h) = 10h^2 - 20 dollars. After how many hours does she break even?

Solve what is the answer -2z+3+7z=-12

4,693,593 to the nearest million

What is the next two answers in the sequence? 1.5 3.9 6.3 8.7 ... ?

What is - 119/5 as a mixed number?

Alexa has set up a lemonade stand outside her house and sells small cups and large cups of lemonade. Each small cups holds 8 ounces of lemonade and each large cup hold 16 ounces of lemonade.

5. Solve the system of equations. 2x+3y=0 x-2y=-7 1-5y =

What is the answer to 12 (4x+2)

Which function is not continuous