Multiply.
? 
A. 
B. 
C. 21z
D. 
Answer: C
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Solve.Two radio transmitters are located 400 miles apart on a shore and send simultaneous signals to a ship that is 200 miles offshore. The signal from transmitter T arrives at the ship 300 microseconds after the signal from transmitter S. The signals travel at the speed of 0.186 miles per microsecond. Find the equation of the hyperbola with foci S and T on which the ship is located. Let the center point between the transmitters correspond to the point (0, 0) and let the x-axis be oriented such that it contains the two transmitters. (Hint: For any point along the hyperbola, the absolute value of the difference of its distances from the foci is 2a.)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Solve using the percentage formula.66
% of what number is 774?
A. 1,161 B. 516 C. 11,610 D. 116.1
Solve the problem.The cost per ton of building an oil tanker can be represented by the model 
where y is the cost in dollars per ton and x is the tons (in thousands). What size of oil tanker (in thousands of tons) can be built for $350 per ton? Round to the nearest thousand tons.
A. 10 thousand tons B. 99 thousand tons C. 198 thousand tons D. 559 thousand tons
How many subsets of the set {3, 4, 6, 8, 9} do not contain a perfect square?
Fill in the blank(s) with the appropriate word(s).