Give the coordinates of the labeled points.
A. A(1, 4); B(0, 5)
B. A(1, -4); B(1, -5)
C. A(-1, 4); B(0, 5)
D. A(1, 4); B(0, -5)
Answer: D
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Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 750e-0.033t, where t is the time in years? Round to the nearest hundredth.
A. 24.75 yr B. 221.61 yr C. 21.00 yr D. 200.61 yr
Solve.The drawing below shows the actual length and width of a display panel. (a) What will be the corresponding drawing width of the panel if the drawing length is 8 inches? (b) Find the scale factor for this drawing.
A. (a) 1 inches,
(b) 4 to 1
B. (a) 2 inches,
(b) 3 to 1
C. (a) 2 inches,
(b) 3 to 1
D. (a) 1 inches,
(b) 4 to 1
Write interval notation.{ x ? x < -7 }
A. (-7, ?) B. (-?, -7] C. [-7, ?) D. (-?, -7)
Choose the most appropriate method for solving the system of equations. Do not solve. 3x - 7y = 13-2x + 5y = 24
A. Substitution B. Addition