Round each of the following to 3 significent figures 770653

Round each of the following to 3 significent figures

77.0653

6,300,78.2

0.00023350

10.2030

2.895 * 10^21

Solution

77.0653 = 77.1 (Round the number after decimal to one pace as we have two signifigant figures before decimal)

6,300,78.2 = 630000 (make everything 0 after the 3)

0.00023350 = 0.000234 (last digits 2, 3 and 4 are significant)

10.2030 = 10.2

2.895 * 10^21 = 2.90* 10^21 (2,9 and 0 are signifcant)