Graph the polar equation.r = 7 sin 2?
A. 
B. 
C. 
D. 
Answer: B
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Use the Concavity Theorem to determine where the given function is concave up and where it is concave down. Also find all inflection points.T(t) = 2t - t3
A. Concave up on (-?, 0) ? (1, ?), concave down on (0, 1); inflection points (0, 0), (1, 2) B. Concave up on (-?, 0), concave down on (0, ?); inflection point (0, 0) C. Concave up on (0, ?), concave down on (-?, 0); inflection point (0, 0) D. Concave down for all t, no points of inflection
Find the standard-form equation of the ellipse centered at the origin and satisfying the given conditions.An ellipse having a focus at (8, 0) and eccentricity equal to 
.
A. 
+ 
= 1
B. 
+ y2 = 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer the question based on the following situation:An honest coin is tossed 1600 times. The random variable X denotes the total number of heads that come up in the 1600 tosses.What are the chances that X is between 780 and 840?
A. approximately 95% B. approximately 34% C. approximately 81.5% D. approximately 68% E. none of these
Solve the problem.Find the average rate of change illustrated in the graph.
Time (in hours)
A. 0.2 miles per hour B. 2.5 miles per hour C. 25 miles per hour D. 5 miles per hour