Solve the problem.Find a formula for the distance from the point P(x, y, z) to the z-axis.
A. 
B. 
C. 
D. 
Answer: D
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Tell whether a linear model or a quadratic model is appropriate for the data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the leading coefficient a of x2 should be positive or negative.
A. quadratic; positive B. quadratic; negative C. linear; negative D. linear; positive
Fill in the blank with one of the words or phrases listed below.
A(n) 
is a natural number greater than 1 that is not prime.
A. mixed number B. multiple C. composite number D. proper fraction
Factor, if possible.27p6 - 1
A. (3p2 - 1)(9p4 + 3p2 + 1) B. (3p2 - 1)3 C. (3p2 - 1)(9p4 + 1) D. Prime polynomial
Find an approximate equation y = abx of the exponential curve that contains the given pair of points. Round the values of a and/or b to two decimal places, if necessary.(4, 42.1) and (8, 89.1)
A. y = 19.89(1.21)x B. y = 254.05(1.21)x C. y = 8.35(1.26)x D. y = 701.67(0.42)x