Increase 20 by 30%
how do you find the answer? ?
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Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

Over the last 8 nights, elyse earned the following in tips: {105, 120, 84, 95, 100, 132, 140}. if she earns $140 a night for the next four nights, which measure of center would increase more, the mean or median?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?