Provide an appropriate response.The length of time (in minutes) that a person arriving at a train station must wait for a train is uniformly distributed with density function f(x) = 
where 0 ? x ? 20. Find the mean waiting time and the standard deviation.
What will be an ideal response?
mean 10 minutes; standard deviation 5.77 minutes
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Multiply.(92)(848)
A. 78,016 B. 78,026 C. 78,116 D. 78,006
Solve the variation problem.The weight of a liquid varies directly as its volume. If the weight of the liquid in a cubical container 3 cm on a side is 81 g, find the weight of the liquid in a cubical container 5 cm on a side.
A. 15 g B. 375 g C. 110 g D. 125 g
Write the phrase as a mathematical expression. Use x to represent the number. Combine like terms if possible.6 times a number added to -8, added to 6 times the sum of 9 times the number 
A. 6x - 8 + 6(9 + 7x); 48x + 60 B. 6(-8 + x) + 6(9x + 7); 60x - 41 C. 6(9x + 7) + [6x + (-8)]; 60x + 34 D. 6(-8 + x) + 6(9 + 7x); 13x + 6
Write the equation for the circle described.Center at 
, radius 
A. 
2 + 
2 = 
B. 
2 + 
2 = 
C. 
2 + 
2 = 
D. 
2 + 
2 = 