Explain why science is is you significant digits

Why use significant digits you ask? Significant digits or significant figures are use as to not be too precise of an actual calculated measure.
Long decimal numbers location like 3.45 * sqrt of 3 gives 5.975575286112627.
That number is too precise.

Rounding it to 5.98 shows an exact closeness to the precision of the measure.

the answer is true.

this statement is true.

They carry out the exchange of gases as we breathe ( oxygen and carbon dioxide).