Simplify. Write in scientific notation. (9 × 10^–3)^2

Question

anonymous · Answer

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

anonymous · Answer

were did all those numbers come from??

anonymous · Answer

is it 8.1 x 10^-5

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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