Solve the system analytically.
A. 
B. 
C. 
D. ?
Answer: B
Mathematics
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A radioactive substance is decaying exponentially with yearly decay factor 0.91. What is the decade decay factor? Round your answer to two decimal places. ?
A. 0.09 B. 0.99 C. 9.10 D. 0.39
Mathematics
Solve the equation.3r + 6 = 30
A. r = 8 B. r = 25 C. r = 4 D. r = 21
Mathematics
Simplify.
-2
A. - 
B. - 
C. 
D. 
Mathematics
Graph the function f by starting with the graph of y = x2 and using transformations (shifting, compressing, stretching, and/or reflection).f(x) = -3x2 
A. 
B. 
C. 
D. 
Mathematics