The letters x and y represent rectangular coordinates. Write the equation using polar coordinates (r, ?).x2 + 4y2 = 4
A. cos2 ? + 4 sin2 ? = 4r
B. 4 cos2 ? + sin2 ? = 4r
C. r2(4 cos2 ? + sin2 ?) = 4
D. r2(cos2 ? + 4 sin2 ?) = 4
Answer: D
You might also like to view...
Prepare a probability distribution for the experiment. Let x represent the random variable, and let P represent the probability.Three coins are tossed, and the number of heads is noted.
A. 
B. 
C. 
D. 
Solve the problem.The graph shows the total sales in thousands of dollars from the distribution of x thousand catalogs. Find the average rate of change of sales with respect to the number of catalogs distributed from 10 to 50.
Number (in thousands)
A. 
B. 1
C. 
D. 2
Which of the following is equivalent to: 
A.
?
B.
?
C.
?
D.
?
E.
?
Perform the indicated operation. Round to the nearest hundredth, if necessary.(-12.7)(9.87)
A. -12.5349 B. -125.349 C. -1253.49 D. -1.25349