The graph of a polar equation is given. Select the polar equation for the graph. 
A. r = 2
B. r = 4 cos ?
C. r sin ? = 2
D. r = 4 sin ?
Answer: B
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Solve the given differential equation.
+ y = 12 + 6 cos 5x
A. y = c1 sin x + c2 cos x + 
cos 5x + 12
B. y = c1 sin x + c2 cos x - 
sin 5x + 12
C. y = c1 sin x + c2 cos x - 
cos 5x
D. y = c1 sin x + c2 cos x - 
cos 5x + 12
Approximate the area under the curve and above the x-axis using n rectangles. Let the height of each rectangle be given by the value of the function at the right side of the rectangle.f(x) = x2 + 2 from x = 1 to x = 4; n = 6
A. 26.875 B. 28.875 C. 30.875 D. 24.875
Use the chart below to answer the question. 
Matt has a budget of $1379. Can he afford to buy the computer for $899 with options (b), (e), and (g)?
A. No B. Yes
A jeweler has three small solid spheres made of gold, of radius 1 mm, 2 mm, and 3 mm. He decides to melt these down and make just one sphere out of them. What will the radius of this larger sphere be? Round the answer to one decimal place.
(a) 4.5mm (b) 3.5mm (c) 5.0mm (d) 6.0mm (e) none of these