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)) = 4?t
B. A(r(t)) = 4t2
C. A(r(t)) = 4?t2
D. A(r(t)) = 2?t2
Answer: C
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Simplify.- 
3
A. 
B. -125y3
C. - 
D. - 
Provide an appropriate response. Find the value of tan 326°. Round to four significant digits.
A. -0.6745 B. 0.6745 C. -0.8871 D. -0.6235
All references are to the figure below. The distance between A and D is a, and the distance between D and C is x. 
Assuming that A = 36°, ?BDC = 42°, and c2 = 21, find h, x, and a.
A. h ? 12.3, x ? 13.7, a ? 3.3 B. h ? 14.1, x ? 15.6, a ? 3.7 C. h ? 12, x ? 14, a ? 3.3 D. h ? 14, x ? 16, a ? 3.7
Let 
and compute the Riemann sum of f over the interval 
, choosing the representative points to be the left endpoints of the subintervals, using:
?
Two subintervals of equal length 
.
?
__________ sq units
?
Five subintervals of equal length 
.
?
__________ sq units
?
Ten subintervals of equal length 
.
?
__________ sq units
?
Can you guess at the area of the region under the graph of f on the interval 
?
?
? __________ sq units
What will be an ideal response?