Evaluate the polynomial function.If f(x) = x2 - 7x + 9, find f(a + 3).
A. a2 - 1a + 21
B. a2 - 7a - 3
C. a2 - 1a - 3
D. a2 - 7a + 6
Answer: C
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Express the relationship between a small change in x and the corresponding change in y in the form 
.y = sin(3x2)
A. dy = -6 cos(3x2) dx B. dy = 6x cos(3x2) dx C. dy = 6 cos(3x2) dx D. dy = -6x cos(3x2) dx
Find the radius or diameter as requested.Find the radius.
A. 3566.07 mi B. 105.818 mi C. 33.7 mi D. 16.85 mi
Refer to this figure to decide whether the statement is true or false. 
Lines DE and KL are parallel.
A. True B. False
Decide whether the relation is a function, and give the domain and range.
A. Function; domain: [2, ?); range: (-?, ?) B. Not a function; domain: [2, ?); range: (-?, ?) C. Function; domain: (-?, ?); range: [2, ?) D. Not a function; domain: (-?, ?); range: [2, ?)