Solve the problem.An airplane flying faster than the speed of sound creates sound waves that form a cone. If ? is the vertex angle of the cone and m is the Mach number for the speed of the plane, then 
Find the Mach number to the nearest tenth if 
A. 5
B. 3.9
C. 3.7
D. 4.5
Answer: B
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Find the surface area or volume.Use numerical integration with a programmable calculator or a CAS to find, to two decimal places, the area of the surface generated by revolving the curve 
about the x-axis.
A. 7.21 B. 2.29 C. 1.15 D. 14.42
Solve by using the square root property.4x2 - 60 = 0
A. 30
B. 16
C. -15, 15
D. -
, 
Provide an appropriate response.
Find the total area.
A. x2 + 32 B. x2 + 12x + 32 C. x2 + 8x + 32 D. x2 + 12
Solve.Each day the commuter train transports x passengers to or from the city at $1.75/passenger. The daily fixed cost for running the train is $1200. Write an equation that relates the daily profit, P, in dollars to the number of passengers each day. Then use the equation to find the daily profit when the train has 920 passengers in a day.
A. P = 1.75x; $1610 B. P = 1200 - 1.75x; $410 C. P = 1.75x - 1200; $410 D. P = 1.75x + 1200; $2810