Final answer:
The function h(x) = 4(x + 9) should be expressed in words as 'Add 9, then multiply by 4', which corresponds to option B.
Step-by-step explanation:
The function h(x) = 4(x + 9) should be expressed in words to describe the steps you would take to calculate h of a given value x. This expression indicates that we should first add 9 to the value of x, and then multiply the result by 4. Therefore, the correct way to express the rule in words is: Add 9, then multiply by 4, which corresponds to option B.