Solve.In a practice run, a race car driver's speed is clocked at 137.607 mph at the end of his first lap, and at 170.047 mph at the end of the next lap. How much faster was he driving at the end of the second lap?
A. 33.440 mph
B. 32.340 mph
C. 32.450 mph
D. 32.440 mph
Answer: D
Mathematics
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Solve the equation.2x2 - 7x - 9 = 0
A. x =
, -1
B. x = 
, 1
C. x = 
, -1
D. x = 
, 0
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Solve. Write the answer as a mixed number in simplest form.Mark is filling decorative oil lamps for a reception. Each lamp can hold 
cup of oil. Mark has 4
cups of oil available. How many oil lamps can Mark fill completely?
A. 9 oil lamps
B. 10 oil lamps
C. 11 oil lamps
D. 8
oil lamps
Mathematics
Use a double-angle identity to find the exact value of the expression.2 cos2 22.5° - 1
A. 
B. 
C. 
D. 
Mathematics