Respuesta :

okokjolie
The answer is A.

First, multiply 3.1 and 1.28

3.1 x 1.28 = 3.968

Next, add the exponents.

3 + 4 = 7

So you get 3.968 x 10^-7

Hope this helped! ♡
C.
3.1+1.28=4.38

[tex]10 {}^{ - 3} + 10 ^{ - 4} = 10 {}^{ - 7} [/tex]
[tex]4.38 \times {10}^{ - 7} [/tex]