Sig Figs

Ex. 29.4 3 s.f

all non-0 digits are significant

Ex. 40.6 3 s.f

0’s between significant digits are significant.

ex. 0.405 3 s.f

all zeros that come before a non 0' digits are not significant.

ex. 4.00 3 s.f

0’s that are at the end of a number with a written decimal are significant.

ex. 40 s.f

0’s coming after a number without a written decimal are not significant place holders

250/ 5.025 = 49.75124378 - 50.

answer must have the same amount of sig. figs as the number with the least

4.0+3.672=7.672 - 7.7

Answer has same number of decimal places as the number with the least.

Accuracy

how close a measurement is to the accepted value

precision

how close multiple trails are to one another