What is 35,681,000,000 expressed in scientific notation

in scientific notation, we leave only 1 digit to left of the decimal point.

now

35681000000   is really the same as 35681000000.0

so we can say the zero is way over there on the right-side, and we have to move it to the left, right in front of the "3", between "3" and "5", so the "3" is the only digit to the left of the decimal point.

to do that, we'll be moving it h 10 slots over, therefore

35681000000

3.5681000000 x 10¹⁰

or

3.5681 x 10¹⁰   < using only significant digits.

you can first factor out the n to get n(1+5). we know that 1+5 is 6, so we just have 6n.