Combine like terms.8.8t + 3.1 - 2.7t
A. -6.1t + 3.1
B. 6.1t + 3.1
C. -6.1t - 3.1
D. 11.5t + 3.1
Answer: B
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Find the required quantity given the wire that lies along the curve r and has density ?.Moment of inertia Iy about the y-axis, where r(t) = 
i + 4tj, 0 ? t ? 1; 
A. Iy = - 100 B. Iy = 100 C. Iy = - 20 D. Iy = 20
Find the standard deviation s for the given data. Round your answer to one more decimal place than the original data.The heights of a group of professional basketball players are summarized in the frequency distribution below. Find the standard deviation. Round your answer to one decimal place. 
A. 2.9 B. 3.2 C. 3.3 D. 2.8
Write the first four terms of the geometric sequence whose first term and common ratio are given.a = 
, r = -10
A. 
, - 4, - 40, - 400, . . .
B. 
, - 
, 
, - 
, . . .
C. 
, - 
, - 
, - 32, . . .
D. 
, - 4, 40, - 400, . . .
Solve the problem.Find the side length of a square with the same perimeter as a circle with radius 8 in. Use 3.14 for 
A. 6.28 in. B. 7.09 in. C. 12.56 in. D. 25.12 in.