Write the rate as a unit rate.4 cents for 2 marbles

A. 6 marbles
B. 0.5 cents/marble
C. 8 cents/marble
D. 2 cents/marble


Answer: D

Mathematics

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Evaluate the improper integral or state that it is divergent.

A.
B.
C. ? + 6
D. 0

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Use De Moivre's theorem to simplify the expression. Write the answer in a + bi form.(4(cos 45° + i sin 45°))5

A. -724.077 - 724.077i B. -2.828 - 2.828i C. -724.077 + 724.077i D. -2.828 + 2.828i

Mathematics

Solve the problem.In the formula A(t) = A0ekt, A is the amount of radioactive material remaining from an initial amount A0 at a given time t, and k is a negative constant determined by the nature of the material. A certain radioactive isotope decays at a rate of 0.3% annually. Determine the half-life of this isotope, to the nearest year.

A. 231 yr B. 167 yr C. 2 yr D. 100 yr

Mathematics

Multiply and simplify. ? 

A.
B.
C.
D.

Mathematics