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
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Evaluate the improper integral or state that it is divergent.
A. 
B. 
C. ? + 6
D. 0
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
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
Multiply and simplify.
? 
A. 
B. 
C. 
D. 