OpenStudy (anonymous):

can someone help me?

2 years ago
OpenStudy (anonymous):

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

27

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

so the expontets are -8 i added them

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

-12

2 years ago
OpenStudy (anonymous):

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 $$2.7 \times 10^{-11}$$

2 years ago
OpenStudy (anonymous):

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

2 years ago
OpenStudy (anonymous):

Glad to be of assistance :)

2 years ago