The body of a 150 lb person contains #2.3 * 10^-4# lb of copper. How much copper is contained in the bodies of 1200 such people?

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Answer 1 · 2018-04-01T17:00:44

#color(red)0.28# lb of copper

The answer will be

#1200xx(2.3xx10^-4)#

#=(1200xx2.3)xx10^-4#

#=2760xx10^-4#

#=2.760xx10^-1#

#=0.2760#

Rounding for significant figures...

#~~color(red)0.28# lb of copper