Use the fact that (a+b)^2 = a^2 + 2ab + b^2 to find the value of 81^2. [hint: (80 + 1)^2]

—the graph shows how fast a strand of human hair grows. how many inches would the hair have grown in 5 months

Agreeting card company can produce a box of cards for $7.50. if the initial investment by the company was $50,000, how many boxes of cards must be produced before the average cost per box falls to $10.50?

How do you find principle and simple interest