## anonymous 3 years ago Simplify. Write in scientific notation. (9 × 10^–3)^2

1. anonymous

12345.67901 or in scientific, it is equal to: 1.234567901*10^5

2. anonymous

were did all those numbers come from??

3. anonymous

is it 8.1 x 10^-5

4. anonymous

Sorry, i read that as a -2 in the end, and yea, what you got is right.

5. anonymous

okay good :) now here is the most hard one.$Evaluate \frac{ 1 }{ 2} a ^{-4} b ^{2} for a = –2 and b = 4.$

6. anonymous

What did I say about using the equation editor? Math ONLY. Anyhow, just plug in for the calculator and you get: $-.2$ or $-\frac{ 1 }{ 5 }$

7. anonymous

neither of those are my options. 2 $\frac{ 1 }{ 2 }$ 3 4

8. anonymous

Hmm, can I see the original question then? Like a pic?

9. anonymous

Actually, I see. Your writing messed me up again. It should be 1/2.

10. anonymous

8. Is the following statement always, never, or sometimes true? A number raised to a negative exponent is negative. always never sometimes