Estimation - the total bill for lunch was $12.72, of which $0.72 was sales tax. what was the sales tax rate rounded to the nearest whole percent?

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Find the balance at the end of 4 years if 1000 is deposited at the rate of

He amount of carbon-14 present in animal bones t years after the animal's death is given by p(t)equals=upper p 0 e superscript negative 0.00012097 tp0e−0.00012097t. how old is an ivory tusk that has lost 26% of its carbon-14?

Aswimming pool measures 22ft by 12ft and is 4ft deep. if the pool is being filled at 2.5 cubic ft per minute, how long will it take to fill the pool?