Solve the problem.A certain noise produces 2.28 × 10-5 watt/m2 of power. What is the decibel level of this noise (to nearest decibel)? Use the formula 
with 
A. 169 decibels
B. 64 decibels
C. 74 decibels
D. 7 decibels
Answer: C
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Solve the problem.The year y when sales were s million dollars for a particular electronics company can be modeled by the radical equation y = 1.2
- 7, where y = 1 represents 2001, and so on. Use the model to predict the sales for 2006 to the nearest tenth of a million.
A. $119.4 million B. $123.4 million C. $121.4 million D. $125.4 million
Graph the numbers on the real number line.x > -7
A. 
B. 
C. 
D. 
Verify the identity.
= 
What will be an ideal response?
Solve the problem.The velocity of a car is 63 cos t km/hr on the time interval [0, 2] hours. Calculate the distance the car traveled in that time interval.
A. 68.714 kilometers B. 183.286 kilometers C. 57.286 kilometers D. 126 kilometers