(0.9 * 0.9 * 0.9 + 0.8 * 0.8 * 0.8) / (1.6 * 1.6 * 1.6 + 1.8 * 1.8 * 1.8) = ?
A). 0.125
B). 0.25
C). 0.5
D). 0.625
Solution;
(0.9 × 0.9 × 0.9 + 0.8 × 0.8 × 0.8) / (1.6 × 1.6 × 1.6 + 1.8 × 1.8 × 1.8)
= ( 0.729 + 0.512) / ( 4.096 + 5.832 )
= ( 1.241) / ( 9.928)
= 0.125
The correct option is A). 0.125
5. What is the value of (.4)2 + (.04)2 + (.004)2?