Find the unknown number in the proportion. Round answer to the nearest hundredth when necessary.
= 
A. x = 19.5
B. x = 29.25
C. x = 30.5
D. x = 8.75
Answer: B
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Find the standard equation of the hyperbola.Foci at (±3, 0), transverse axis with length 4
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Find the missing quantities. If there is no operating loss or absolute loss, write "none."
A. Operating exp = $40.24 Operating loss = $29.83 Absolute loss = $10.41 B. Operating exp = $10.41 Operating loss = $9 Absolute loss = $1.41 C. Operating exp = $9 Operating loss = $10.41 Absolute loss = $1.41 D. Operating exp = $9 Operating loss = $1.41 Absolute loss = $10.41
Use the graph of f to determine the intervals where f is increasing and where f is decreasing.
A. increasing: [0, ?); decreasing (-?, 0] B. increasing: never; decreasing: (-?, ?) C. increasing: (-?, 0]; decreasing [0, ?) D. increasing: (-?, ?); decreasing: never
Find the expected value.A fair coin is tossed three times, and a player wins $3 if 3 tails occur, wins $2 if 2 tails occur and loses $3 if no tails occur. If one tail occurs, no one wins. What is the expected value of the games?
A. $0.75 B. $2.00 C. -$3.00 D. $3.00