Question

Is the answer to number 10 correct? if i have C^0 would i just add 1 to my answer?

Answer 1

You wouldn't add 1, but multiply. First multiply all factors with the same base. When you do that, their exponents get added:

$C^0D^{-5}D^6C^1C^2C^3=C^{0+1+2+3}D^{-5+6}=C^6D^1$

Notice how $C^0C^1=C^{0+1}=C^1$. The factor with zero exponent contributes nothing new to the product, so the effect is the same as multiply $C^1$ by 1. In general, $a^0=0$ for any non-zero number $a$.