Solve the problem.A = ?r2, where r is the radius, in centimeters. By approximately how much does the area of a circle decrease when the radius is decreased from 2.0 cm to 1.8 cm? (Use 3.14 for ?.)
A. 2.7 cm2
B. 2.5 cm2
C. 1.3 cm2
D. 2.3 cm2
Answer: B
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Determine whether the sequence converges or diverges, and, if it converges, find 
an.an = 
A. - 1
B. 5
C. 
D. Diverges
Find the probability.In a certain college, 33% of the physics majors belong to ethnic minorities. Find the probability that, from a random sample of 10 physics majors, no more than 6 belong to an ethnic minority.
A. 0.9815 B. 0.9846 C. 0.913 D. 0.0547
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.sec ? = 4, 0 < ? < 
Find cos 
.
A. 
B. 
C. 
D. 
Find the value of the indicated trigonometric function of the angle ? in the figure. Give an exact answer with a rational denominator.
Find csc ?.
A. csc ? = 
B. csc ? = 
C. csc ? = 
D. csc ? = 