Question

use the following function rule to find f(129).
f(x) = 9\sqrt{x - 93}
f(129) = \square

Explanation:

Step1: Substitute $x=129$ into function

$f(129) = 9\sqrt{129 - 93}$

Step2: Calculate inside the square root

$129 - 93 = 36$

Step3: Compute square root of 36

$\sqrt{36} = 6$

Step4: Multiply to get final value

$9 \times 6 = 54$

Answer:

54