Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 750e-0.033t, where t is the time in years? Round to the nearest hundredth.

A. 24.75 yr
B. 221.61 yr
C. 21.00 yr
D. 200.61 yr


Answer: C

Mathematics

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Find the domain of the function.f(x) = 

A. x < 4 B. All real numbers C. x ? 0 D. x ? -4

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Provide an appropriate response.Explain in your own words why possible solutions of radical equations must be checked.

What will be an ideal response?

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Solve the equation using the quadratic formula. Simplify irrational solutions, if possible.x2 + 7x + 3 = 0

A.
B.
C.
D.

Mathematics