Solve the problem.A formula for calculating the distance, d, that can be seen from an airplane to the horizon is 
where x is the altitude of the plane in feet. Find d when the altitude is 21,710 feet. Round your answer to the nearest hundredth.
A. 179.76 feet
B. 279.76 feet
C. 13,243.1 feet
D. 148.56 feet
Answer: A
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Convert to an exponential equation.log6 1 = 0
A. 06 = 1 B. 10 = 6 C. 60 = 1 D. 61 = 0
Solve the problem.Assume that the price per unit d of a certain item to the consumer is given by the equation 
where x is the number of units in demand. The price per unit from the supplier is given by the equation 
where x is the number of units supplied. Find the equilibrium price and the equilibrium quantity.
A. equilibrium price: $35 per unit; equilibrium quantity: 50 units B. equilibrium price: $50 per unit; equilibrium quantity: 30 units C. equilibrium price: $20 per unit; equilibrium quantity: 50 units D. equilibrium price: $30 per unit; equilibrium quantity: 50 units
Solve the equation.
x = 2
A. {0} B. {5} C. {6} D. {4}
Factor.u2 - 5uv - 50v2
A. (u - 5v)(u + v) B. (u - v)(u + 10v) C. (u + 5v)(u - 10v) D. (u - 5v)(u + 10v)