Question

Help please due later today.....

Answer 1

Explanation:

a).

2.2 ×
`10^(-3)` + 9 ×
`10^(-4)` =

2.2 ×
`10^(-3)` + 0.9 ×
`10^(-3)` =

( 2.2 + 0.9 ) ×
`10^(-3)` = 3.1 ×
`10^(-3)`

b).

2.2 ×
`10^(-3)` - 9 ×
`10^(-4)` =

2.2 ×
`10^(-3)` - 0.9 ×
`10^(-3)` =

( 2.2 - 0.9 ) ×
`10^(-3)` = 1.3 ×
`10^(-3)`

Answer 2

a- the sum = 0.0031

b- the fly is 0.0013 grams heavier