Saturday, January 21, 2012

Sig Fig Help?

Using the rules of sig figs:



A rectangular solid measures 1.0m by 5.6 cm by 2.1 dm. Express it volume in cubic meters, liters, cubic inches and cubic feet.

Sig Fig Help?
1.0m * 5.6cm * 2.1 dm



Convert all measurements to meters.

1.0m * 0.056m * .21m = .01176 cubic meters. Now round to 2 sig figs = .01 cubic meters.



1 cubic meter is equal to 1000 liters

.01176 * 1000 = 11.76 liters. Rounded to 2 sig figs = 12 liters.



1 cubic meter = 61023.7441 cubic inches

.01176 * 61023.7441 = 717.6392, rounded to 2 sig figs = 720 cubic inches.



1 cubic meter = 35.3 cubic feet (rounded)

.01176 * 35.3 = .415128. Rounded to 2 sig figs = .42 cubic feet.
Reply:1*560*21=11760m



you get 2 sig figs

answer is 12000m or 12 km


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