Question

Simplified?

0.0007 - (4.9 × 10^-7)
A.
4.8993 × 1^0-7
B.
6.9951 × 10^-7
C.
2.1 × 10^-4
D.
6.9951 × 10^-4

Answer 1

Option B

Explanation:

Given the following question:

In order to find the answer, we need to convert the scientific notation into standard notation and then simplify by subtracting the decimals. Then we convert the standard notation back into scientific notation.


`0.0007 - (4.9* 10^(-7) )`

`4.9*10^(-7) =0.00000049`

`0.0007-0.00000049`

`0.0007-0.00000049=0.00069951`

`=0.00069951`

`0.00069951=6.9951 *10^(-7)`

`=6.9951 *10^(-7)`

Your answer is "6.9951 × 10^-7" or option B.

Hope this helps.