Solve the problem.The decay of 696 mg of an isotope is given by A(t) = 696e-0.015t, where t is time in years. Find the amount left after 10 years. Round to the nearest milligram.
A. 590 mg
B. 686 mg
C. 599 mg
D. 300 mg
Answer: C
Mathematics
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Solve the system. If the system's equations are dependent or if there is no solution, state this. x + y + z = 7 x - y + 2z = 72x + 3z = 15
A. (1, 2, 4) B. The equations are dependent. C. No solution D. (4, 2, 1)
Mathematics
Solve the problem.Two pages that face each other in a book have 449 as the sum of their page numbers. What is the number of the page that comes first?
A. 223 B. 224 C. 222 D. 225
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Find the opposite of the expression.2x2 + 9x - 5
A. -2x2 + 9x + 5 B. -2x2 - 9x + 5 C. -2x2 - 9x - 5 D. 2x2 - 9x + 5
Mathematics