Solve the problem.An oil well off the Gulf Coast is leaking, with the leak spreading oil over the surface of the gulf as a circle. At any time t, in minutes, after the beginning of the leak, the radius of the oil slick on the surface is 
Find the area A of the oil slick as a function of time.
A. A(r(t)) = 9t2
B. A(r(t)) = 9?t
C. A(r(t)) = 3?t2
D. A(r(t)) = 9?t2
Answer: D
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Give an appropriate answer.There are many websites devoted to polling public opinion on a wide range of topics from politics to consumer preferences. Do you think that these polls are biased with respect to the general U.S. population? Explain.
What will be an ideal response?
Find the complex conjugate of the complex number. Then find the product of each complex number and its complex conjugate.-5i
A. 5i; 25 B. 5i; -10 C. -5i; 10 D. 5i; -25
Give the degree of the polynomial.
?
?
A. 
B. 0
C. This is not a polynomial
D. No defined degree
Find the exact value of the indicated trigonometric function of ?, if ? is an angle in standard position whose terminal side contains the given point.(-20, 48); Find sin ?.
A. 
B. - 
C. 
D. - 