When expressing a number to 2 significant figures, you must round the number to the nearest value. In this case, 99.99 to 2 significant figures would be 100. This is because the third significant figure, the 9 in the hundredths place, is greater than 5, so the 9 in the tenths place would round up to the next whole number.
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9,900 because the two signifcant figures are both 9's, likewise if it was to 3 sig. figs. then the answer would be 9,990.
100.
Interesting question, though, because that has only one significant figure.
You could indicate accuracy to 2 sig fig by using scientific notation: 1.0*102.
The answer is 10,000 not 9900 because it should be as close to the original number as possible and for numbers 5 and above you round up not down
There are two significant figures in 0.025.
2 significant figures.
2 significant figures.
2 significant figures.
2 significant figures.