Use summation notation to write the sum.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Sketch the graph of the parametric equations. Then set up the appropriate integral to find the length of the curve and use a computer to evaluate it.x = 2 sin t, y = 2 cos t, 0 ? t ? 2?
A. L = 5?
B. L = 5?
C. L = 2?
D. L = 4?
Find the length of the curve.x = 
(t3 - 3t), y = t2 + 5, 0 ? t ? 1
A. 
B. 
C. 
D. 2
State a sample space S with equally likely outcomes for the given experiment.A box contains 2 blue cards numbered 1 through 2, and 3 green cards numbered 1 through 3. List the sample space of picking a blue card followed by a green card.
A. S = {(1,1), (1,2), (2, 1), (2, 2), (3, 1), (3, 2)} B. S = {(1, 1), (1, 2), (1, 3), (2, 1), (2, 2), (2, 3)} C. S = {12} D. S = {7}
The number of lumens (time rate of flow of light) L from a fluorescent lamp can be approximated by the model ? L = -0.294x2 + 97.744x- 664.875, 20 ? x ? 90 ? where x is the wattage of the lamp. ? Use a graphing utility to select the graph of the function. Use the graph to estimate the wattage necessary to obtain 2400 lumens. ?
A. ?
40W
B. ?
30W
C. ?
45W
D. ?
25W
E. ?
35W