Find the indicated intersection or union.{q, s, u, v, w, x, y, z} ? {s}
A. {v, x}
B. {q, s, u, v, w, x, y}
C. {s}
D. {s, u, w}
Answer: C
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Use a calculator to evaluate.1,8932
A. 1,895 B. 7,572 C. 3,786 D. 3,583,449
Decide whether 
is positive, negative, or zero.
Use the REGRESSION feature on a graphing calculator.A strain of E-coli Beu-recA441 is placed into a petri dish at 30?Celsius and allowed to grow. The following data are collected. Theory states that the number of bacteria in the petri dish will initially grow according to the law of uninhibited growth. The population is measured using an optical device in which the amount of light that passes through the petri dish is measured. 
Find the exponential equation in the form y = a ? bx, where x is the hours of growth. Round to four decimal places.
A. y = 1.3384 ? 0.0903x B. y = 0.0903x C. y = 0.0903 ? 1.3384x D. y = 1.3384x
Use the graph of the quadratic function to find the vertex, axis of symmetry, x- and y-intercepts, and domain and range.
A. vertex: (-2, -9) axis of symmetry: x = -2 x-intercepts: 1 and - 5 y-intercept: -5 domain: [-9, ?) range: (-?, ?) B. vertex: (-2, -9) axis of symmetry: x = -9 x-intercepts: 1 and - 5 y-intercept: -5 domain: (-?, ?) range: (-9, ?) C. vertex: (-9, -2) axis of symmetry: x = -9 x-intercept: -5 y-intercepts: 1 and - 5 domain: (-?, ?) range: [-2, ?) D. vertex: (-2, -9) axis of symmetry: x = -2 x-intercepts: 1 and - 5 y-intercept: -5 domain: (-?, ?) range: [-9, ?)