Answer and write in scientific notation:

(9X10^5)-(3X10^5)

Question

Answer and write in scientific notation:

(9X10^5)-(3X10^5)

anonymous · Answer

$$3*10^5*(3-10^{-8})$$

kropot72 · Answer

I see you edited your question. Th answer is as follows:
$$(9\times10^{5})-(3\times10^{5})=10^{5}(9-3)=6\times10^{5}$$

mathhelp346 · Answer

what about the other 10^5

kropot72 · Answer

$$10^{5}$$is a common factor to the two bracketed terms in the question. Therefore it was taken outside a bracket leaving just a simple subtraction. Have you checked out the answer?

mathhelp346 · Answer

? wouldnt it be 10^10 though

kropot72 · Answer

Did you mean to multiply or subtract the two bracketed terms in the question?

mathhelp346 · Answer

idk?

mathhelp346 · Answer

but if u subtracted 10^5 and 10^5 would that be 0??

kropot72 · Answer

You are right that 10^5-10^5=0. But that is not the original question which shows 3 times 10^5 subtracted from 9 times 10^5.

mathhelp346 · Answer

so you need 9-3 which gave u 6 right

mathhelp346 · Answer

and then u did 10^5-10^5?

kropot72 · Answer

If the question is (9*10^5)-(3*10^5) then first take out the common factor 10^5 giving:
10^5(9-3) and do the subtraction to give10^5*6.
Then express 10^5*6 in scientific notation as 6.0 * 10^5

mathhelp346 · Answer

ok ty