Give the focus, directrix, and axis for the parabola.y2 = -8x
A. (-2, 0), y = 2, y-axis
B. (0, -2), y = 2, y-axis
C. (-2, 0), x = 2, x-axis
D. (2, 0), x = -2, x-axis
Answer: C
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Find the product.(0.5 + 9a)(0.4 + 7a)
A. 0.2 + 7.1a + 63a2 B. 0.2 - 7.1a + 63a2 C. 0.2 + 7.1a + 0.63a2 D. 2 + 7.1a + 63a2
Find the mode.The last seven computer games sold at the local electronics store cost $20, $36, $46, $36, $49, $36, $49.
A. The mode is $36. B. The mode is $38.90. C. The mode is $46. D. The mode is $49.
Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find [H3O+] if the pH = 6.
A. 1.0 × 10-6 B. 2.0 × 106 C. 1.0 × 106 D. 3.0 × 10-6
Supply the missing numbers. fraction decimal percent 
If necessary, round the decimal to the nearest thousandth and the percent to the nearest tenth.
A. 0.333 3.33% B. 0.453 453% C. 0.333 33.3% D. 0.453 45.3%