Answer: 
Step-by-step explanation:
Given
The height of the cylinder is 
The volume of the cylinder is 
The volume of the cylinder is the product of area and height

Insert the values

Thus, the area of the cross-section is 
For 1 play, the chance of gaining $8 is 4/38, while the chance of losing the $1 is 34/38. Therefore, the expected value is ($8)(4/38) + ($-1)(34/38) = $(-1/19). Over 50 plays, which are mutually independent of each other, we multiply the number of plays by the expected value to get $(-50/19) = $-2.63.
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Answer:
-2.08
Step-by-step explanation:
If you just switch the problem, to make it 4.58-2.5, you get negative 2.5
Answer:
1/2 hour each
9 3/4 + 1/4 = 10
12 - 10 = 2
2 divided by 4 = .5 (1/2 hour)