The graph of a function f is given. Use the graph to answer the question.Is f(20) positive or negative?
A. positive
B. negative
Answer: A
Mathematics
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Find the dot product v ? w.v = 13i - 13j,
w = -9i + 8j
A. -221 B. -104 C. -13 D. -117
Mathematics
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
B. 
C. 
D. 
Mathematics
Find the sum.
A. 35 B. -3 C. 30 D. 9
Mathematics
Simplify the expression.e-ln x6
A. 6
B. 
C. 
D. x6
Mathematics