Solve the problem.Find the half-life of the radioactive element radium, assuming that its decay constant is 
with time measured in years.
A. 2308 years
B. 800 years
C. 1600 years
D. 1400 years
Answer: C
Mathematics
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Solve the problem.Consider an election in which the votes were cast as follows. How many of Burnaby's votes would Costello need to win the runoff election?
A. 125 B. 68 C. 63 D. 126
Mathematics
Use the Factor Theorem to determine whether x - c is a factor of f(x).f(x) = 7x4 + 20x3 - 3x2 + x - 3; x + 3
A. Yes B. No
Mathematics
Find the reciprocal.
A. 
B. 14
C. No reciprocal
D. 1
Mathematics
Find the volume of the specified solid. Use 3.14 as the approximate value of ?, and round your answer to the nearest tenth.A hemisphere with radius 4.5 in.
A. 214.6 in.3 B. 381.5 in.3 C. 190.8 in.3 D. 107.3 in.3
Mathematics