Sig Figs, Scientific Notation and Conversions

7. 1 x 2.456723189468238979874924 = (Don’t use your calculator!) Let’s look at addition and subtraction: 8. 145 lbs – 3.0 lbs = (Hint: Line up the decimal places like you did in elementary school) 9. 145 lbs – 0.4 lbs = 10. The Earth has a mass of 6.0 x 1024 kg. A 0.15 kg baby chinchilla is born. ................
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