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How you do this? can you do the first one, i'll try the second one if you can explain

Perform the following operations and give the answear in standard exponential form with the correct number of significant figures

1) 37.2mL + 18.0mL + 380mL=
2) 0.57cm x 0.86cm x 17.1cm=

add the first. line up the decimals. Now notice that in the last, the zero in the units position is not a significant digit.

adding..435.2 milliliters
but after the tens digit, nothing is significant. So the answer is 440ml, and in standard form 4.4*101 ml.

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