Determine if the graph of the function opens upward or downward and whether it has a maximum or a minimum point.f(x) = 8x2
A. Downward, maximum
B. Upward, maximum
C. Downward, minimum
D. Upward, minimum
Answer: D
Mathematics
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Round to the nearest tenth.0.42
A. 0 B. 0.4 C. 0.5 D. 0.3
Mathematics
Solve the system of equations by elimination.2x + 8y = -4812x + 2y = 80
A. (8, -8) B. (12, -12) C. (-2, 8) D. (-8, 8)
Mathematics
Solve the problem.The amount of a radioactive substance present, in grams, at time t in months is given by the formula 
Find the number of grams present in 4 years. If necessary, round to three decimal places.
A. 2140.644 B. 214.064 C. 0.000 D. 0.001
Mathematics
Use the graph of a known basic function and a combination of horizontal shifts, reflections, and vertical shifts to sketch the function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics