Solve the problem.Given that the polar equation r = 
models the orbits of the planets, compare Earth's orbit relative to the sun with that of Pluto and describe the difference. For Earth, 
and 
For Pluto, 
and 
A. Earth circles the sun, but Pluto does not.
B. Earth's orbit closely approximates a circle with the sun positioned at its center. Pluto's orbit is more elliptical with the sun positioned on its long axis about 10 astronomical units away from the center.
C. Pluto's orbit closely approximates a circle with the sun positioned at its center. Earth's orbit is more elliptical with the sun positioned on its long axis about 10 astronomical units away from the center.
D. The orbits of Earth and Pluto are both circular, with the sun positioned at their centers, but the diameter of Pluto's orbit is about 40 times that of Earth.
Answer: B
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Use the circle graph to answer the question.How did a family spend a total of 20,000 miles driving to different locations for various purposes over the course of one year? Simplify the fraction representing the number of Medical miles driven. 
A. 
B. 
C. 
D. 
Convert the angle in radians to degrees.
?
A. 370° B. 740?° C. 185° D. 6°
Evaluate the expression for the given values. Expression your answer as a fraction unless otherwise indicated.
x = 9, y = 5
A. 10 B. 18 C. 4 D. 2
Factor completely. If the polynomial cannot be factored, write "prime."16x2 + 81
A. prime B. (4x + 9)(4x - 9) C. (4x - 9)2 D. (4x + 9)2