The equation of a hyperbola is given. Match the equation with its graph.
- 
= 1
A. 
B. 
C. 
D. 
Answer: A
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Use a calculator to approximate the circular function value (rounded as indicated).cot 0.1725
(Round to three decimal places.)
A. 0.9852 B. 1.015 C. 5.739 D. 0.1742
Find the median for the set of numbers.102, 108, 214, 215, 310, 385
A. 215 B. 214 C. 214.5 D. 190.5
Simplify. Assume all variables and radicands represent nonnegative real numbers.
A. 
B. 
C. 
D. p
Solve the problem.The orbit of a planet around a sun is an ellipse with the sun at one focus. The aphelion of a planet is its greatest distance from the sun, its perihelion is its shortest distance, and its mean distance is the length of the semimajor axis of the elliptical orbit. If a planet has a perihelion of 406.5 million miles and a mean distance of 408 million miles, write an equation for the orbit of the planet around the sun.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1