Answer:
All rational numbers greater than 24
Step-by-step explanation:
X^2 + 30x + 21
= ( x + 15)^2 - 225 + 21
= (x + 15)^2 - 204
Its D minimum at -204
I think the answer is a. f(x)= cos(x).
Using the information that you've provided, I would say that Mr. Banks drove home at 5:15, but if you're asking what time he arrived home that would be at 6:30. :))
