Find the least common multiple.18, 13
A. 78
B. 13
C. 31
D. 234
Answer: D
Mathematics
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Solve the given applied problems involving variation.The period of vibration P for a pendulum varies directly as the square root of the length L. If the period of vibration is 
when the length is 
what is the period when 
A. 5.0 s B. 4.8 s C. 1.4 s D. 1.0 s
Mathematics
Find the center of mass of a thin plate of constant density covering the given region.The region bounded by the x-axis and the semicircle y = 
A. 
= 
, 
= 0
B. 
= 
, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Mathematics
Are the sets equal?A = {17, 18, 18, 19, 19, 19, 20, 20, 20, 20}B = {20, 19, 18, 17}
A. Yes B. No
Mathematics
Factor and simplify the expression.1 - sin3x
A. (1 - sin x)(1 - 2 sin x + sin2x) B. (1 - sin x)(cos x + sin2x) C. (1 - sin x)3 D. (1 - sin x)(1 + sin x + sin2x)
Mathematics