Calculate how long it will take each friend to pay off his debt, and how much he’ll end up paying in total for the $300 iPod. Based on this, how much would you say an item really “costs” when you pay with a credit card?

Asequence of numbers begins with 12 and progresses geometrically. each number is the previous number divided by 2. which value can be used as the common ratio in an explicit formula that represents the sequence? 1/2 2 6 12

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed