which expression is equivalent to (st)(6)?\no s(t(6))\no s(x) × t(6)\no s(6) × t(6)\no 6 × s(x) × t(x)

Explanation:

Step1: Recall function - product definition

The notation ((st)(x)) for two functions (s(x)) and (t(x)) is defined as ((st)(x)=s(x)\times t(x)).

Step2: Substitute (x = 6)

When (x = 6), we have ((st)(6)=s(6)\times t(6)).

Answer:

C. (s(6)\times t(6))