Solve the problem.The function A = Aoe-0.0099x models the amount in pounds of a particular radioactive material stored in a concrete vault, where x is the number of years since the material was put into the vault. If 500 pounds of the material are placed in the vault, how much time will need to pass for only 226 pounds to remain?
A. 85 years
B. 160 years
C. 90 years
D. 80 years
Answer: D
Mathematics
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Determine the truth value for the compound statement given that p is a true statement, q is a false statement, and r is a false statement. ~(p ? q) ? (r ? ~q)
A. True B. False
Mathematics
Write the number in scientific notation.67,000
A. 6.7 x 10-4 B. 6.7 x 10-5 C. 6.7 x 105 D. 6.7 x 104
Mathematics
Perform the indicated operations. Write the answer using only positive exponents. Assume that all variables represent positive real numbers.
A. 246/5x
B. 244/5x
C. 
D. 
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Solve the problem.Is the function f(?) = sin ? + tan ? even, odd, or neither?
Fill in the blank(s) with the appropriate word(s).
Mathematics