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(0.38 x 0.38 + 2 x .38 x .62 + .62 x .62) / (0.72 x 0.72 - 2 x .72 x .52 + .52 x .52)

A1 1/2

B1/4

C25

D.25

Answer:

C. 25

Read Explanation:

(a+b)²/(a - b)² = (0.38+0.62)² / (0.72-0.52)² = 1²/0.2² =100/4 = 25

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(0.27)2+(0.21)2+(0.29)2(0.027)2+(0.021)2+(0.029)2 \sqrt { \frac{(0.27)^2+(0.21)^2+(0.29)^2 }{(0.027)^2+(0.021)^2+(0.029)^2 }} =