Physics

When the number 0.046508 is reduced to 4 significant figures, then it becomes :


ANSWER

$$4.651 \times  { 10 }^{ -2 }$$


SOLUTION
$$0.046508\approx 4.6508\times 10^{-2}$$
$$\downarrow $$
5 significant digits
To have 4 significant digits 
$$\rightarrow 4.6508\approx 4.651$$
(If the digit to be dropped is more than 5, then the preceding digit is raised by 1)
So, $$0.046508\approx 4.651\times 10^{-2}$$
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