Question

What is the sum of 4.2 × 105 and 5.3 × 10^5?

A.)95 × 10^5

B.)95 × 10^10

C.)9.5 × 10^5

D.)9.5 × 10^10

Answer 1

(4.2*105)+(5.3*10^5)
441 + 530000
530441

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If your problem is (4.2*10^5)+(5.3*10^5), it would be
420000 + 530000
950000

Answer 2

Option C.

Explanation:

The two expressions are
`4.2* 10^(5)` and
`5.3* 10^(5)`

We have to find the total of these two terms.

`(4.2* 10^(5)` +
`5.3* 10^(5))`

Now we take out
`10^(5)` as a common term.

`10^(5)(4.2+5.3)`

=
`9.5* 10^(5)`

Therefore, Option C. will be the answer.