Find an for the given geometric sequence.a2 = -10, r = -2

A. an = 5(-2)n - 1
B. an = -10(-2)n - 1
C. an = 5(-2n)
D. an = 5(-2)n


Answer: A

Mathematics

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Find the center of mass of a thin plate covering the given region with the given density function.The region between the curve y =  and the x-axis from x = 1 to x = 9, with density ?(x) = 

A.  =  = 
B.  = 5,  = 
C.  =  = 
D.  =  = 

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Find the total surface area and the volume of the following right prism. (Round to the nearest tenth.)

A. T = 1157 in.2, V = 3490 in.3 B. T = 1057 in.2, V = 1690 in.3 C. T = 520 in.2, V = 1790 in.3 D. T = 520 in.2, V = 1890 in.3

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Represent the system of linear equations in the form AX = B and solve by finding A-1 and using X = A-1B.  y + z = 4,3x    - z = 6, 2x + y + 3z = 9

What will be an ideal response?

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Write the whole number in standard form.Twenty thousand, five hundred forty-four

A. 20,044 B. 200,544 C. 20,544 D. 2544

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