Find the nth term an of the geometric sequence.2, -6, 18, -54, 162, . . .

A. an = (2)(-3n)
B. an = a1 - 3n
C. an = (2)(-3)n-1
D. an = (2)(-3)n


Answer: C

Mathematics

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Find an equation for the ellipse described. Graph the equation.Foci at (0, 5) and (-8, 5); vertex at (-9, 5)

A.  +  = 1

B.  +  = 1

C.  +  = 1

D.  +  = 1

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Write a numerical expression for the phrase and simplify it.The sum of -5 and -12, increased by -10

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Find the volume. Use ? ? 3.14. Round to the nearest tenth when necessary.a cylinder with radius 9 in. and height 9 in.

A. 508.7 in.3 B. 9156.2 in.3 C. 2289.1 in.3 D. 254.3 in.3

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Find the whole.50% of what number of highways is 96 highways?

A. 19.2 B. 192 C. 1920 D. 48

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