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)) = 36?t2
B. A(r(t)) = 36t2
C. A(r(t)) = 36?t
D. A(r(t)) = 6?t2
Answer: A
Mathematics
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A. 8.5 B. 85.0 C. 0.9 D. 9.5
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Solve the equation.log (5 + x) - log (x - 3) = log 5
A. -5
B. ?
C. 5
D. 
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Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 18
D. 
Mathematics
Classify the polynomial as constant, linear, quadratic, cubic, or quartic, and determine the leading term, the leading coefficient, and the degree of the polynomial.f(x) = 9x2 - 11 + 0.19x - 5x3
A. Quadratic; 9x2; 9; 2 B. Cubic; -5x3; -5; 3 C. Cubic; x3; -5; 3 D. Constant; -11; -11; 1
Mathematics