Solve the problem.A formula for calculating the distance, d, one can see from an airplane to the horizon on a clear day is 
where x is the altitude of the plane in feet and d is given in miles. How far can one see in a plane flying at 27,000 feet? Round your answer to the nearest tenth mile, if necessary.
A. 200.5 miles
B. 16,470 miles
C. 181.5 miles
D. 1647 miles
Answer: A
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Solve.The current I in an electrical conductor varies inversely as the resistance R of the conductor. The current is 2 amperes when the resistance is 680 ohms. What is the current when the resistance is 354 ohms?
A. 0.96 amperes B. 3.8 amperes C. 1 amperes D. 0.26 amperes
Solve the initial value problem.
= csc x, y(2) = -9
A. y = 
- 9
B. y = 
+ 2
C. y = -
- 9
D. y = 
- 9
Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions.log x + log(x2 - 144) - log 7 - log(x - 12)
A. log 
B. log 
C. log 
D. log 
Solve the quadratic equation using the quadratic formula.x2 - 12x + 61 = 0
A. {6 + 5i} B. {6 - 25i, 6 + 25i} C. {1, 11} D. {6 - 5i, 6 + 5i}