Solve the problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 45 units of vitamin A, at least 11 units of vitamin B, and at least 37 units of vitamin C. The red vitamin pills cost 
each and contain 6 units of A, 1 unit of B, and 2 units of C. The blue vitamin pills cost 
each and contain 4 units of A, 1 unit of B, and 5 units of C. How many pills should the patient take each day to minimize costs?
A. 5 red and 6 blue
B. 11 red and 0 blue
C. 7 red and 4 blue
D. 6 red and 5 blue
Answer: D
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A. 
B. 
C. 
D. 
Determine whether the graph opens upward or downward.y = 4x2 - 64x + 259
A. Upward B. Downward
In the LORAN (LOng RAnge Navigation) radio navigation system, two radio stations located at A and B transmit simultaneous signals to a ship or an aircraft located at P. The onboard computer converts the time difference in receiving these signals into a distance difference |A| - |B|, and this, according to the definition of a hyperbola, locates the ship or aircraft on one branch of a hyperbola (see the figure). Suppose that station B is located L = 480 mi due east of station A on a coastline. A ship received the signal from B 1280 microseconds (?s) before it received the signal from A. Assuming that radio signals travel at a speed of 1000 ft/?s and if the ship is due north of B, how far off the coastline is the ship? Round your answer to the nearest mile. Select the correct answer.
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Find the exact interest to the nearest cent.$8,500 at 7% for 125 days
A. $201.64 B. $198.88 C. $203.77 D. $206.60