Subtract. 9n7 - 7n5 + 20
A. 6n7 + 9n5 + 16
B. 6n7 - 4n5 + 16
C. 6n7 + 9n5 + 24
D. 39n12
Answer: C
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Solve the application problem.The graph shows the height as a function of time of a ball thrown straight up from an initial height of 112 feet. What is the height of the ball after 5.5 seconds? 
A. approximately 125 feet B. approximately 150 feet C. approximately 175 feet D. approximately 200 feet
Round to the indicated place.Winds have reached 319 miles per hour during a series of violent tornadoes that hit Oklahoma City. Round to the nearest ten miles per hour.
A. 330 miles per hour B. 320 miles per hour C. 300 miles per hour D. 319 miles per hour
Solve the equation for x if 
.
?
?
A. 0, 
, 
B. 
, 
, 
C. 0, 
, 
D. 
, 
, 
E. 
, 
, 
Solve the problem.The range r of a projectile is given byr = 
v2 sin 2?,where v is the initial velocity and ? is the angle of elevation. If r is to be 
and 
what must the angle of elevation be? Give your answer in degrees to the nearest hundredth.
A. 89.83° B. 0.34° C. 0.24° D. 0.17°