Let represent the total cost

MATHEMATICS · Single correct · A Level · Mathematics · Differentiation · Differentiation

Problem

Let

C(x)

represent the total cost, in dollars, of producing

x

smartphones, where

x

is measured in hundreds of phones. What are the units of

C'(x)

? (a)

\text{dollars per phone}

(b)

\text{phones per dollar}

(c)

\text{dollars per hundred phones}

(d)

\text{dollars per (hundred phones)}^{2}