Determine if the relation is a function.S={(-9, -16), (-8, -14), (-18, 0), (-10, -16), (-9, -19)}
A. Function
B. Not a Function
Answer: B
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Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.
1/4
A. 
B. 
C. 
D. 3ab2
An aircraft manufacturer wants to determine the best selling price for a new airplane. The company estimates that the initial cost of designing the airplane and setting up the factories in which to build it will be 700 million dollars. The additional cost of manufacturing each plane can be modeled by the function 
where x is the number of aircraft produced and m is the manufacturing cost, in millions of dollars. The company estimates that if it charges a price p (in millions of dollars) for each plane, it will be able to sell x(p) = 390 ? 5.8p.
Find the cost function.
Solve the problem.A flare fired from the bottom of a gorge is visible only when the flare is above the rim. If it is fired with an initial velocity of 192 ft/sec, and the gorge is 560 ft deep, during what interval can the flare be seen? 
A. 10 < t < 12 B. 5 < t < 7 C. 0 < t < 5 D. 15 < t < 17
Solve the system by the addition method. 2x + 20y = -908x + 4y = 20
A. {(-4, 5)} B. {(5, -5)} C. {(8, -8)} D. {(-5, 5)}