Perform the calculation and record the answer with the correct number of significant figures.

Question

Perform the calculation and record the answer with the correct number of significant figures.

(34.123+4.20) divided by (98.7654−6.639)=

Answer 1

34.123 + 4.20 the sig figure is in the hundreths place so 38.323 but to 4 sig figs

98.7654 - 6.639 the sig figure is in the thousandths place so 92.1264 but to 5 sig figures

then when we do the division we have 38.323/92.1264 to the fewest sig figs (4 in the numerator)

=0.4159828.. to 4 sig figures where the 9 is underlined the next figure to the right is 5 or more so we round up to 0.4160 or in scientific notation 4.160 x10^-1