Find the length of the curve.The circle r = 5 cos ?
A. 25?
B. 5?
C. 
?
D. 10?
Answer: B
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Write as a percent. Round to the nearest hundredth of a percent when necessary.
A. 4.25 % B. 2.35 % C. 23.53 % D. 42.5 %
Solve.The outline of a certain planet can be considered a circle with a radius of approximately 4000 miles. Thus, if the center of this planet is located at (0, 0), then an equation for this circle is 
. Suppose an incoming meteor is approaching the planet in a hyperbolic path. The equation describing the meteor's path is 
Will the meteor strike the planet? If so, locate the point (x, y) where the meteor will strike. Assume that x and y are both positive, and round to three significant digits.
A. Yes, at the point (x, y) ? (5370, 6690) B. Yes, at the point (x, y) ? (4710, 4000) C. Yes, at the point (x, y) ? (7590, 4000) D. No, the meteor will not strike the planet.
Arrange the group of numbers in order, from least to greatest.5.25, 5
, 5.52, 5
A. 5.25, 5.52, 5
, 5
B. 5.25, 5
, 5.52, 5
C. 5
, 5.52, 5
, 5.25
D. 5
, 5
, 5.25, 5.52
Simplify the expression.
+ 
? 
A. 
B. 
C. 
D. 