Solve the problem.Find the expected number of girls in a family of 5 children.
A. 2.5
B. 2.25
C. 3
D. 2
Answer: A
Mathematics
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Use the given transformation to evaluate the integral. src="https://sciemce.com/media/4/ppg__as0610191830__f1q49g7.jpg" alt="" style="vertical-align: -4.0px;" />
A. 2,673
B. 33
C. 5,346
D. 66
Rwhere R is the parallelogram bounded by the lines 
Mathematics
Find the focus and directrix of the parabola.y2 = -12x
A. F: (0, -3); D: y = 3 B. F: (-3, 0); D: y = 3 C. F: (3, 0); D: x = -3 D. F: (-3, 0); D: x = 3
Mathematics
Identify the radicand and index.9ab 
A. b2; 2
B. 9ab; 2
C. b2 - 5; 3
D. 
; 3
Mathematics
Perform the operation and reduce to lowest terms.10
× 1
A. 19
B. 10
C. 18
D. 20
Mathematics