6) Rewrite 4^-2times 4^5 using a single, positive exponent.

To rewrite $$4^{-2}\times 4^{5}$$ using a single, positive exponent, we can use the rule of exponents that states when multiplying two powers with the same base, we add the exponents.

So, we have:

$$4^{-2}\times 4^{5} = 4^{-2+5}$$

Now, we can simplify the exponent:

$$4^{-2+5} = 4^{3}$$

Therefore, the expression $$4^{-2}\times 4^{5}$$ can be rewritten as $$4^{3}$$ .