Question

can someone help me?

Answer 1

Let's break it up first!
What's 4.5 x 6?

Answer 2

27

Answer 3

Ok! So now what's \(10^{-4} \times 10^{-8}\)?
Remember that exponents add when you multiply numbers with the same base.

Answer 4

so the expontets are -8 i added them

Answer 5

No, try again!
-4 + (-8) = ??

Answer 6

-12

Answer 7

Yes! So now we have \(27 \times 10^{-12}\). But this isn't proper notation because we need it expressed in the ones digit placement rather than the tens (or hundreds. . etc.).

So as a rule of thumb, if we move the decimal to the left, then we add to the exponent. If we move to the right. then we subtract from the exponent. In this case, we want to move the decimal to the left one digit, therefore, we must add 1 to the exponent.

Our final answer should be
\(2.7 \times 10^{-11}\)

Answer 8

it was right :) but the rest worst i got 40% THANK YOU THO!!! the other questions i did where wrong.

Answer 9

Glad to be of assistance :)