Help please due today

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?

Which function can be used to model the monthly profit for x trinkets produced? f(x) = –4(x – 50)(x – 250) f(x) = (x – 50)(x – 250) f(x) = 28(x + 50)(x + 250) f(x) = (x + 50)(x + 250)

Marco states that 7.696696669…… is a rational number because it is a repeating decimal. is he correct? justify your answer.