Evaluate the integral.
A. 136
B. 30
C. 1
D. 24
Answer: B
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Find the absolute value.
A. -9.5 B. 19 C. 9.5 D. 0
Rationalize numerator.
A. 
B. 
C. 
- 
D. 
A simplex matrix is given. In this case, the solution is complete, so identify the maximum value offand a set of values for the variables that gives this maximum value. If multiple solutions may exist, indicate this and locate the next pivot.
A. The maximum value off is 80 when
,
and
.
B. The maximum value of f is 80 when 
, 
and 
.
C. The maximum value of f is 80 when
,
. Since multiple solutions are possible, pivot on 2 in R1C3.
D. The maximum value of f is 80 when
,
. Since multiple solutions are possible, pivot on 1 in R1C4.
E. The maximum value of f is 80 when
,
. Since multiple solutions are possible, pivot on 1 in R2C4.
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 5.6 volts. Use Newton's method to find the useful working time of the cell to the nearest tenth of an hour (that is, solve V(t) = 5.6 volts). Use t = 7 hours as your initial guess and show all of your work to find x3 as your approximation.
What will be an ideal response?