Use a graphing calculator to solve the problem.Let f(x) = sin 
+ cos x on the interval I = (0, 7). Use the graph to estimate where f''(x) < 0 on I.
A. (0, 1.77) ? (4.52, 7)
B. (0, 5.77)
C. (1.77, 4.52)
D. (0, 3.14) ? (3.14, 7)
Answer: A
Mathematics
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A. -x3 - 21x2 + 180x - 378 B. -x3 - 9x2 + 378 C. -x3 - 303x2 + 36x + 207 D. -x3 + 9x2 + 54
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Guess the rule used to change one number into another.
A. 4n + 3 B. 3n + 1 C. 2n + 7 D. None of the above is the correct rule.
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Determine whether the network is an Euler circuit.
A. Yes B. No
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Give the equation of the horizontal asymptote, if any, of the function.R(x) = 
A. y = -7, y = 5 B. no horizontal asymptotes C. y = 0 D. y = -3
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