Solve the problem.A certain radioactive isotope has a half-life of approximately 1650 years. How many years to the nearest year would be required for a given amount of this isotope to decay to 45% of that amount?
A. 1423 yr
B. 1901 yr
C. 908 yr
D. 1856 yr
Answer: B
Mathematics
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Solve the problem.A fair coin is tossed 5 times and heads or tails is noted on each toss. How many different outcomes are there in the sample space?
A. 2 B. 10 C. 32 D. 25 E. none of these
Mathematics
Find the requested probability.A box contains the following mixture of colored marbles: 5 black, 3 red, 3 yellow, and 1 green. What is the probability of drawing three marbles of the following colors, in order, if they are drawn without replacement: black, green, black?
A. 
B. 
C. 
D. 
Mathematics
Simplify.
A. 
B. 
C. 4t + 7u
D. 7t + 4u
Mathematics
Let 
. Compute the following.
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What will be an ideal response?
Mathematics