Question

(2c)-4 d

Answer 1

2c-4d

Answer 2

the -4 is a power

Answer 3

When you raise a product to a power, you multiply the exponents:

\[2 = 2^1\]
\[c = c^1\]
\[(2c)^{-4} = (2^1c^1)^{-4} = 2^{1\cdot -4}c^{1\cdot -4} = 2^{-4}c^{-4}\]

And when you have negative exponents it's good to move them to the other side of the fraction bar and change the sign of the exponent.
\[2^{-4}c^{-4} = \frac{1}{2^4c^4} = \frac{1}{16c^4}\]