Posted by **Russell** on Wednesday, August 15, 2007 at 10:05pm.

if you have 19.2 x 10 ^ 20 over 4.8 x 10 ^ 9

Would you first subtract 4.8 from 19.2 then subtract 10 ^ 9 from 10 ^20

Leaving an answer of

14.4 x 10^11????

you are using the word "over", which implies division.

Why would you even consider subraction

(19.2 x 10 ^ 20) over (4.8 x 10 ^ 9)

=(19.2 x 10 ^ 20) รท (4.8 x 10 ^ 9)

= 19.2/4.8 * 10^20 / 10^9

= 4 * 10^11

Perhaps you were thinking of the procedure of dividing powers with the same base, where you

**subtract** the exponents.

Thank you!!!! My mind is going blah.......first you divide number but then you just subtract then when you divide......this can be confusing, but I get it now :)

Thank you again!

## Answer This Question

## Related Questions

- Math, Please Help! - Ned divided a given number by 3 and then added 2. If he ...
- Math 8R - Help!!!!!!!!!!!!!!!!!!! - 14. Subtract -5 from -14 -14 - (-5) 16. ...
- Math - if I was doing algebra and it was 3/5a - (-4)=5 would I first subtract 4 ...
- Algebra - When multiplying two numbers written in scientific notation what do ...
- Algebra - I am re posting this for fear that it was overlooked earlier. I have ...
- math ( subtracting fractions) - 12 1/4- 4 1/8 When you add or subtract fractions...
- algebra - how do I solve 3/8x+5=25 First subtract 5 from both sides. first you ...
- algebra 2 - solve the inequality: -3(r-11)+15> 9 _ this is as far as Ive ...
- Algebra - Hello all! I had a quick homework question: I have to prove that the ...
- Math/Pre Algebra HELP ME! - 1. What are the coefficients in the polynomial 5x^2...

More Related Questions