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 (hypothetical) planet has a perihelion of 575.2 million miles and a mean distance of 578 million miles, write an equation for the orbit of the planet around the sun.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: C
Mathematics
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Graph the polar equation.r = 5 - cos ?
A. 
B. 
C. 
D. 
Mathematics
Determine the equation of the line described. Put answer in the slope-intercept form, if possible.Through (1, 5), perpendicular to x = -2
A. x = -2 B. y = -2 C. y = -5 D. y = 5
Mathematics
Add or subtract as indicated.42 - 3.25
A. 41.675 B. 38.975 C. 0.95 D. 38.75
Mathematics
Solve.A plane flies 420 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 26 mph, what is the speed of the plane in still air?
A. 252 mph B. 272 mph C. 237 mph D. 247 mph
Mathematics