Graph the ellipse and label the center.
+ 
= 1
A. C(9, 11)
B. C(-9, 11)
C. C(-9, -11)
D. C(9, -11)
Answer: B
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Find an approximate value for the integral, using the trapezoidal rule with n intervals. Round the answer to the nearest tenth if necessary.
n = 4
A. 690 B. 70 C. 700 D. 770
Solve the problem.A team of engineers is testing an experimental high-voltage fuel cell with a potential application as an emergency back-up power supply in cell phone transmission towers. Unfortunately, the voltage of the prototype cell drops with time according to the equation 
where V is in volts and t is the time of operation in hours. The cell provides useful power as long as the voltage remains above
What will be an ideal response?
First, use front end rounding to estimate each answer. Then find the exact answer.
+ 272
What will be an ideal response?
Divide and simplify.
A. x2y2 - 3 - 9xy
B. xy - 3 - 
C. x2y2 - 3 - xy
D. x2y2 - 3 - 