Halley's comet has an elliptical orbit with the sun at one focus. Its orbit shown below is given approximately by In the formula, r is measured in astronomical units. (One astronomical unit is the average distance from Earth to the sun, approximately 93 million miles.) Find the distance from Halley's comet to the sun at its greatest distance from the sun. Round to the nearest hundredth of an astronomical unit and the nearest million miles.

• A. 12.13 astronomical units; 1128 million miles
• B. 91.54 astronomical units; 8513 million miles
• C. 5.69 astronomical units; 529 million miles
• D. 6.06 astronomical units; 564 million miles

Question 3 of 20