Solve the problem.A planet travels around the sun in an elliptical orbit given approximately by 
where r is measured in miles and the Sun is at the pole. Find the distance from the planet to the Sun at perihelion (shortest distance from the Sun.)
A. 3.50 × 107 mi
B. 6.20 × 107 mi
C. 4.47 × 107 mi
D. 3.50 × 106 mi
Answer: A
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Provide an appropriate response.Use a graphing calculator to determine which equation corresponds to the graph. 
A. y = 
x - 2
B. y = - 
x + 3
C. y = - 
x - 3
D. y = 
x + 2
Make the conversion indicated. Round your result to the nearest tenth.159°F ? 
°C
A. 120.3 B. 318.2 C. 70.6 D. 228.6
Solve the problem.Suppose that the amount of light I (in milliwatts per square centimeter) of a light bulb at a distance d centimeters is given by the equation 
Determine the amount of light at a distance of 75 centimeters from the light bulb.
A. 4 milliwatts per square centimeter B. 300 milliwatts per square centimeter C. 225 milliwatts per square centimeter D. 3 milliwatts per square centimeter
Give the center and radius of the circle. Then sketch its graph.
2 + (y + 3)2 = 25
A. center 
, r = 5
B. center 
, r = 5
C. center 
, r = 5
D. center 
, r = 5