Question

Please help math thanks.

Answer 1

700.000 = 7 . 10 . 10 . 10 . 10 . 10

We know that equal bases sum the exponents, so,

7 . 10^(1 + 1 + 1 + 1 + 1)

7 . 10^5 = 700.000

But we can also say:

(7 . 10) . 10^4

or

(70 . 10) . 10³

or

(700 . 10) . 10²

or

(7000 . 10) . 10

As we can see, the alternative C shows (7 . 10) . 10^4 which can be a correct ans, so, alternative C.

Answer 2

First question the answer is B & C.

Second question the answer is 2.