A researcher chooses three leaves from a target environment and classifies each sample as fungus-free or contaminated. Suppose that a leaf has a probability of 0.4 of being infected. Find the probability, that three leaves are infected. Please round your answer to three decimal places.
?
P = __________
Fill in the blank(s) with the appropriate word(s).
0.064
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Determine if the series converges or diverges. If the series converges, find its sum.
A. converges; - 
B. converges; ?
C. diverges
D. converges; 
Translate the problem situation to a system of equations. Do not solve.Bill & Jose's Discount Cinema sold adult tickets for $5.70 each and children's tickets for $1.60 each. Last Tuesday, a total of $489.90 was collected from 114 movie watchers. How many of each type were sold?
A. x + y = 489.90; 5.70x + 1.60y = $114 B. x + y = 7.30; 5.70x + 1.60y = $489.90 C. x + y = 114; 5.70x + 1.60y = $489.90 D. x - y = 114; 5.70x + 1.60y = $489.90
Find the curvature of the space curve.r(t) = -9i + (4 + 2t)j + (t2 + 7)k
A. ? = 
B. ? = - 
C. ? = 
D. ? = 
Find the area of the surface generated when the given curve is revolved about the x-axis. y = 
on 
A. 
B. 
C. 
(19
- 7
)
D. 
(21
- 
)