Plutonium-239 is used as a fuel for some nuclear reactors and also as the fissionable material in atomic bombs. It has a half-life of 24,400 years. How long will it take 40 grams of plutonium-239 to decay to 3 grams?
?
Round your answer to the nearest hundreds.
?
__________ years
Fill in the blank(s) with the appropriate word(s).
91,200
Mathematics
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Use the 68-95-99.7 rule to solve the problem.For adults in the town of Bridgeport, systolic blood pressure is normally distributed with a mean of 137 mmHg and a standard deviation of 9 mmHg. What percentage of adults in the town have a systolic blood pressure less than 128 mmHg?
A. 32% B. 84% C. 68% D. 16%
Mathematics
Provide an appropriate response.If 
= 2, find 
f(x).
A. 3 B. 2 C. 1 D. Does not exist
Mathematics
Identify the two types of control discussed in the text and how each contributes to organization effectiveness.
What will be an ideal response?
Mathematics
Simplify the radical expression. Assume that all variables represent positive real numbers.
A. 
B. x
C. 
D. 
Mathematics