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 522.2 million miles and a mean distance of 525 million miles, write an equation for the orbit of the planet around the sun.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: D
Mathematics
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The function 
satisfies the equation of change 
. For what values of f is the graph of f versusx increasing?
?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.A railroad tunnel has the shape of half an ellipse. The height of the tunnel at the center is 42 ft and the vertical clearance must be 6 ft at a point 12 ft from the center. Find an equation for the ellipse, where x and y are measured in ft. 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Perform the indicated operations. Express the answer as a single polynomial in standard form.-8x3(-10x - 3)
A. 80x4 - 3 B. 104x3 C. 80x + 24 D. 80x4 + 24x3
Mathematics
Find the difference. Simplify the result.
- 
A. 
B. 
C. 
D. 
Mathematics