Solve.The radius r of a plastic tube used in manufacturing a child's toy must not differ from the standard s by more than 3 millimeters. The manufacturing engineers express this as 
Find the limits of r if the standard s is 39.
A. r ? 33 or r ? 36
B. 33 ? r ? 36
C. r ? 36 or r ? 42
D. 36 ? r ? 42
Answer: D
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Graph the function by starting with the graph of the basic function and then using the techniques of shifting, compressing, stretching, and/or reflecting.f(x) = (x - 1)2 + 4
A. 
B. 
C. 
D. 
Use a product-to-sum identity to rewrite the expression.cos 1° sin 48°
A. 0.5(sin(49°) + sin(47°) ) B. 0.5(cos(-47°) - cos(49°) ) C. 0.5(sin(49°) + sin(-47°) ) D. 0.5(cos(49°) + cos(-47°) )
Find the exact value under the given conditions.tan ? = 
, ? < ? < 
; cos ? = - 
, 
< ? < ?Find sin (? + ?).
A. 
B. 
C. 
D. 
Write the vertex form of a parabola that satisfies the conditions given. Assume that a = ±1.Opens downward, vertex (2, -3)
A. y = -(x + 2)2 + 3 B. y = -(x - 2)2 - 3 C. y = (x + 2)2 + 3 D. y = (x - 2)2 - 3