Express the sum using summation notation. Use 1 as the lower limit of summation and i for the index of summation.3 + 6 + 9 + . . . + 27
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.The shape of a patio is trapezoidal with a height of 10 ft and bases of 17 ft and 
What is the cost of outdoor carpeting to cover the patio if the carpeting costs 
per ft2?
A. $816.75 B. $264.00 C. $770.00 D. $209.00
Mathematics
Find the center of mass of a thin plate covering the given region with the given density function.The triangular region cut from the first quadrant by the line y = -x + 3, with density ?(x) = x
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 
, 
= 
Mathematics
Provide an appropriate response.In the following diagram, suppose that 
= 
. Prove that XY is parallel to BC.
What will be an ideal response?
Mathematics
Find the nth term of the geometric sequence.a = -2; r = 
A. an = 
(-2)n-1
B. an = -2 
n-1
C. an = -2 
n-1
D. an = -2 
n
Mathematics