What is 99.99 to 2 significant figures?

Answer 1

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

Answer 2

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.

Answer 3

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.

Answer 4

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.

Answer 5

1.0 x 10^2