Solve the problem.What percent of the figure is shaded?
A. 64%
B. 0.64%
C. 60%
D. 6.4%
Answer: A
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Solve the problem.Data for the amount of sun-induced expansion (in mm) of a steel I-beam were collected. The measurements are 7.82, 7.83, 7.70, 7.81, and 7.75. Find the standard deviation and variance for the data. Round the results to the nearest thousandth.
A. s = 0.045, v = 0.002 B. s = 0.111, v = 0.012 C. s = 0.139, v = 0.019 D. s = 0.002, v = 0.001
Find the center, foci, and vertices of the ellipse.16x2 + 36y2 = 576
A. center at (0, 0)
foci at (- 2
, 0) and (2
, 0)
vertices at (-6, 0), (6, 0)
B. center at (0, 0)
foci at (-6, 0) and (6, 0)
vertices at (-36, 0), (36, 0)
C. center at (0, 0)
foci at (0, - 2
) and (0, 2
)
vertices at (0, -6), (0, 6)
D. center at (0, 0)
foci at (0, -4) and (0, 4)
vertices at (0, -16), (0, 16)
If ?ABD ? ?CEB then two pairs of triangles are congruent in this figure. Give both of them and state which congruence principles apply and why.
Multiply.-2x7(6x4 + 10x2)
A. -12x11 + 10x2 B. -12x11 - 20x9 C. -32x7 D. -32x11 - 32x9