Solve the problem.One card is selected from a deck of cards. Find the probability of selecting a red card or a card less than 4. (Note: The ace is considered a low card.)
A. 
B. 
C. 
D. 
Answer: C
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Sketch the graph of a continuous function f on the given domain that satisfies all conditions.f has domain [-4, 4]; f(-4) = 0; f(4) = 4;f'(x) < 0 on (-2, 2); f'(x) > 0 on (-4, -2) ? (2, 4)f''(x) < 0 on (-4, 0); f''(x) > 0 on (0, 4)
A. 
B. 
C. 
D. 
Classify the function as a polynomial function, rational function, or root function, and then find the domain. Write the domain in interval notation.f(x) = 
A. root function; (-?, 
]
B. root function; (-?, 
) ? (
, ?)
C. root function; (-?, 21) ? (21, ?)
D. root function; (-?, 21]
When both copying machines A and B are working, secretaries can make 91 copies in one minute. In one minute's time, copiers A and C together produce 85 copies, and all three working together produce 127 copies. How many copies per minute can each machine produce separately? ? Select the correct answer. (a, b, c are the productivity of the A, B, and C machines). ?
A. machine A 49 copies, machine B 42 copies, machine C 36 copies B. machine A 49 copies, machine B 42 copies, machine C 31 copies C. machine A 44 copies, machine B 47 copies, machine C 36 copies D. machine A 49 copies, machine B 47 copies, machine C 31 copies E. machine A 44 copies, machine B 42 copies, machine C 41 copies
Solve the problem.Find 
(-2) when f(x) = 2x - 6 and g(x) = 5x2 + 14x + 3.
A. - 1
B. - 
C. 2
D. 0