Solve the problem.The area of a circle is found by the equation A = ?r2. If the area A of a certain circle is 144? square centimeters, find its radius r.
A. r = ± 12 cm
B. r = 12 cm
C. r = 12? cm
D. r = 12
cm
Answer: B
Mathematics
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Evaluate the integral by using multiple substitutions.
dy
A. 
sin4 
+ C
B. 
cos4 
+ C
C. 2 sin4 
+ C
D. 6 sin2 
+ C
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Solve. If necessary, round percents to the nearest whole.In a recent survey of 216 people, 54 said that their favorite color of car was white. What percent of the people surveyed liked white cars?
A. 5% B. 4% C. 25% D. 26%
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Provide an appropriate response.A student claims that the equation tan ? + 1 = sec ? is an identity, since by letting ? = 0° we get 0 + 1 = 1, a true statement. Comment on this student's reasoning.
What will be an ideal response?
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Find the partial sum.
A. 
B. 
C. 
D. 
E. 
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