Give the equation for a circle with the given center and radius.Center at (0, 9), radius 4
A. x2 + (y - 9)2 = 16
B. (x + 9)2 + y2 = 16
C. x2 + (y + 9)2 = 4
D. (x - 9)2 + y2 = 16
Answer: A
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Evaluate the improper integral.
A. 12 B. 24 C. 16 D. 20
As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.Suppose that the student is given the N-value. What is a reasonable estimate for the number of white marbles in the container?
A. 480 B. 320 C. 107 D. 300 E. none of these
Perform the indicated operation and simplify. Assume all variables in the radicand are greater thanor equal to zero.
A. 10a10
B. 10a5b11
C. 
D. 
Multiply.-8(-1)(-10)(-3)
A. 38 B. 240 C. 1 D. -240