Solve. Use ? ? 3.14 and round to the nearest hundredth.The sound of an explosion at a fireworks factory was heard 27 miles away in every direction. How many square miles are in the area where people heard the explosion?
A. 9156.24 ft2
B. 169.56 ft2
C. 84.78 ft2
D. 2289.06 ft2
Answer: D
Mathematics
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Plot the parametric surface over the indicated domain.r(u, v) = cos u sin vi + cos v sin uj + sin vk; 0 ? u ? 2?, 0 ? v ? 2?
A. 
B. 
C. 
D. 
Mathematics
Use the integral test to determine whether the series converges.
A. diverges B. converges
Mathematics
Divide.-6i ÷ (-10 + 2i)
A. 
+ 
i
B. - 
+ 
i
C. 
+ 
i
D. - 
+ 
i
Mathematics
Find the probability.The table lists the eight possible blood types. Also given is the percent of the U.S. population having that type.
Let E be the event that a randomly selected person in the U. S. has type B blood. Let F be the event that a randomly selected person in the U. S. has RH-positive blood.Find P(F|E).
A. 0.818 B. 0.340 C. 0.720 D. 0.107
Mathematics