Let's correct the numbers to the number of significant figures indicated in the brackets:
In getting the correct numbers based on the significant figures required, we will round off the number to the required significant number needed.
a.) 475.83107 (4 s.f.) = Rounding off to the tenths place = 475.8
b.) 59.07203 (3 s.f.) = Rounding of to the tenths place = 59.1
c.) 0.0000683 (2 s.f.) = Rounding off to the millionths place = 0.000068
d.) 0.0498502 (1 s.f.) = Rounding off to the hundredths place = 0.05
