Find the moment or center of mass of the wire, as indicated.Find the center of mass of a wire of constant density that lies along the first-quadrant portion of the circle 
A. 
= 
, 
= 
B. 
= 
, 
= 
C. 
= 
, 
= 
D. 
= 0, 
= 
Answer: C
Mathematics
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Use a tree diagram to answer the question.A family has 4 children. Using a tree diagram that shows how many ways the children could have been born, from first born to last born, determine how many ways the family could have had one boy and 3 girls.
A. 8 B. 6 C. 2 D. 4
Mathematics
Find the magnitude and direction angle (to the nearest tenth) for each vector. Give the measure of the direction angle as an angle in [0,360°].
A. 12; 45°
B. 6; 45°
C. 6
; 135°
D. 6; 225°
Mathematics
Solve the given equation by finding the unknown value.5 ? ? = 45
A. 8 B. 45 C. 9 D. 225
Mathematics
Factor by grouping.20a3 - 24a2b - 25ab2 + 30b3
A. (4a2 - 5b)(5a - 6b) B. (4a2 + 5b2)(5a + 6b) C. (20a2 - 5b2)(a - 6b) D. (4a2 - 5b2)(5a - 6b)
Mathematics