For the given Cartesian equation, write an equivalent polar equation.x2 + (y - 19)2 = 361
A. r = 38 cos ?
B. r2 = 38 cos ?
C. r = 38 sin ?
D. r = 19 sin ?
Answer: C
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Solve the problem.Joe has to take a test which consists of short-answer questions worth 5 points each and essay questions worth 15 points each. He must do at least 9 short-answer questions, but won't have time to do more than 8. He has to answer at least 3 essay questions but can't spend time to do more than 8. If no more than 17 questions can be done, what is his maximum score?
A. 145 B. 175 C. 195 D. 165
Add or subtract. Then simplify. If a denominator has two or more factors (other than monomials), leave it in factored form. Express the answer using the denominator of the first fraction when applicable.
- 
A. 
B. 
C. 10
D. 0
Is the following statement true or false?-14 ? 20
A. True B. False
Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 10 miles per hour greater than the speed of the eastbound train. After 8 hours, the distance between the westbound train and the eastbound train is 560 miles. Twice the speed of the westbound train is 40 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 30 mph; westbound, 40 mph; northbound, 40 mph B. eastbound, 20 mph; westbound, 50 mph; northbound, 40 mph C. eastbound, 40 mph; westbound, 40 mph; northbound, 30 mph D. eastbound, 40 mph; westbound, 40 mph; northbound, 50 mph