A certain radioactive element has a half-life of 30 years. How long does it take for an 80-gram sample to decay to 20 grams? Explain why you do not need your calculator to solve this problem.
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Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

Suppose your sat score is 2040. a college with an average sat score for admintted students of which of these would most likely be your best option?

If a seller prepaid the taxes of $4,400 and the closing is set for may 19, using the 12 month/30 day method what will the buyer owe the seller as prorated taxes?