Use the two steps for solving a linear programming problem to solve the problem.A doctor has told a sick patient to take vitamin pills. The patient needs at least 28 units of vitamin A, at least 7 units of vitamin B, and at least 20 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 2 blue
B. 7 red and 0 blue
C. 2 red and 5 blue
D. 6 red and 1 blue
Answer: A
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Find the probability.What is the probability that 8 rolls of a fair die will show three threes? Round to the nearest ten-thousandth.
A. 0.1042 B. 0.2084 C. 0.0521 D. 0.0208
Provide an appropriate response.Examine the discriminant and find the roots of the equation, rounding to the nearest tenth if necessary: 5x2 - 6x = -5
A. x = 0.6 ± 1.17i B. x = 0.6 ± 0.8i C. x = 1.4, -0.2 D. x = 3 ± 4i
Find the exact value of the expression.cos 
A. 
B. 
C. 1
D. 
Solve the problem.An object is propelled vertically upward from the top of a 112-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 2 seconds B. 0.6 seconds C. 5.5 seconds D. 11.6 seconds