Question

use the following function rule to find f(81).
f(x) = 12√x
f(81) =

Explanation:

Step1: Substitute $x=81$ into $f(x)$

$f(81) = 12\sqrt{81}$

Step2: Calculate square root of 81

$\sqrt{81} = 9$

Step3: Compute final product

$f(81) = 12 \times 9$

Answer:

108