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
A. [(-5) + (-12)] + (-10); -17 B. [5 + 12] + 10; 27 C. [(-5) + (-12)] + 10; -7 D. [(-5) + (-12)] + (-10); -27
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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
Mathematics