Identify the type of sampling described by the proposal.A lobbyist for the oil industry assigns a number to each senator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the senators corresponding to these numbers.
A. cluster sample
B. convenience sample
C. systematic sample
D. simple random sample
E. stratified sample
Answer: D
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Use Euler's method to calculate the first three approximations to the given initial value problem for the specified increment size. Round your results to four decimal places.y' = y2(1 - 2x), y(-1) = -1, dx = 0.5
A. y1 = 0.7, y2 = 0.99, y3 = 1.2656 B. y1 = 0.5, y2 = 0.75, y3 = 1.03125 C. y1 = 0.7, y2 = 0.99, y3 = 1.9136 D. y1 = 0.4, y2 = 0.63, y3 = 0.7472
Use the distributive property to simplify.-4(5m - 9)
A. -20m + 36 B. -20m - 36 C. 36m - 20 D. -36m + 20
Find the center of the hyperbola. 16(x + 3)2 - 25(y + 1)2 = 400
A. (2, -1) B. (-1, -3) C. (3, 1) D. (-3, -1)
Determine if the graph is symmetric with respect to x-axis, y-axis, and/or the origin.
A. x-axis, origin B. x-axis, y-axis, origin C. Origin D. x-axis