Solve.An expression important in the study of electrical fields is 
, where V represents voltage and i represents current. Assume that the voltage equals (a2 - b2) and that the current equals (a + b), where a and b are constants. Write the expression 
in simplified form.
A. a - b
B. ab
C. a + b
D. 
Answer: A
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Perform the indicated division by synthetic division.(x2 + 13x + 30) ÷ (x + 3)
A. x - 10, R = 0 B. x + 3 , R = 0 C. x + 10, R = 0 D. x + 30, R = 0
Find the critical point(s) of the function. Then use the second derivative test to classify the nature of each point, if possible. Finally, determine the relative extrema of the function.
?
?
A. 
; saddle point: 
B. 
; relative maximum value: 
C. 
; relative minimum value: 
D. there are no critical points
Solve.x5 - 9x3 ? 0
A. (-?, -3] ? [3, ?) B. [-3, 0] ? [3, ?) C. (-?, -3] ? [0, 3) D. [-3, ?)
Solve the problem.Before exercising, an athlete measures her air flow and obtains a = 0.65 sin 
where a is measured in liters per second and t is the time in seconds. If a > 0, the athlete is inhaling; if a < 0, the athlete is exhaling. The time to complete one complete inhalation/exhalation sequence is a respiratory cycle. What is the amplitude? What is the period? What is the respiratory cycle? Graph a over two periods beginning at t = 0. 
What will be an ideal response?