Discussion
What is the value of X in the following equation? 0.00005 × X = 0.5
Answer: B
X = 10000. Divide both sides by 0.00005: \[ X = \frac{0.5}{0.00005} \] \[ = \frac{5 \times 10^{-1}}{5 \times 10^{-5}} = 10^{4} \]
So X is 10000. The option 1000 would give 0.05 on the left side, 1.0000 (which is just 1) would give 0.00005, and 10.000 (which is 10) would give 0.0005, none of which equals 0.5.
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