(6500+13300)/2 = 9900
6575
6500
6250
9.2857
6500
What is the difference between 6500. and 6500? The first one would be considered to have a terminal decimal. This means that instead of simply writing the number as it is, a decimal is added to the end to represent significant figures (terminal decimals are most commonly used in scientific notation). Therefore, when 6500 would only be considered as to having 2 significant figures, 6500. has 4 significant figures.
4.32 (rounded)
81
ee
4% of 6500 = 4% * 6500 = 0.04 * 6500 = 260
143022% of 6500= 22% * 6500= 0.22 * 6500= 1430
80% of 6500 = 80% * 6500 = 0.8 * 6500 = 5,200