Give the focus, directrix, and axis for the parabola.x2 = 8y
A. (2, 0), y = 2, y-axis
B. (0, -2), x = -2, x-axis
C. (0, 2), y = -2, y-axis
D. (2, 0), x = 2, x-axis
Answer: C
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Find the average value of 
over the given region.
over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 15
C. 10
D. 
Simplify and write the answer using scientific notation. Use the correct number of significant digits.5.8 × 10-12 + 9.3 × 10-12
A. 1.51 × 10-11 B. 15.1 × 10-12 C. 15 × 10-12 D. 1.5 × 10-11
Find the area of the region.A homeowner is planning a vegetable garden and needs to know the area to determine how much compost to add. Find the area of the rectangular garden.
10 ft
A. 75 sq ft B. 100 sq ft C. 25 sq ft D. 50 sq ft
Determine the amplitude or period as requested.Amplitude of y = 
sin 
A. 
B. 
C. 
D. 