Question

Need help asapppp plssss helppp meeee thanksss

Answer 1

6.73 ×
`10^(-8)`

Explanation:

7.4 ×
`10^(-8)`

6.7 ×
`10^(-9)` = 0.67 ×
`10^(-8)`

7.4 ×
`10^(-8)` - 0.67 ×
`10^(-8)` = ( 7.4 - 0.67 ) ×
`10^(-8)` = 6.73 ×
`10^(-8)`

Answer 2

0.0000000673

Explanation:

7.4*10^-8=0.000000074

6.7*10^-9=0.0000000067

0.000000074-0.0000000067

=0.0000000673=673*10^-10