Simplify.11x4(7x + 8)
A. 165x4
B. 77x5 + 88x4
C. 77x5 + 8
D. 77x + 88
Answer: B
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For the pair of functions, find the indicated composition.f(x) = 
, g(x) = 9x + 8Find (g ? f)(x).
A. x
B. 9x + 64
C. x - 
D. x + 16
Solve the problem.Scores on a test are approximately normally distributed with a mean of 70 and a standard deviation of 9. The teacher wants to give A's to the top 10% of students. What is the bottom cutoff for an A grade? Round your answer to the nearest whole number.
A. 79 B. 90 C. 80 D. 82
Write the given number in scientific notation.721
A. 7.21 × 103 B. 7.21 × 101 C. 7.21 × 10-2 D. 7.21 × 102
Use the graph of f to evaluate the given expression(s).f(-1) and f(0)
A. f(-1) = 0 and f(0) = -1 B. f(-1) = -1 and f(0) = 0 C. f(-1) = 0 and f(0) = 1 D. f(-1) = 1 and f(0) = 0