Can you help me with these 3?

Mr. walker gave his class the function f(x) = (x + 3)(x + 5). four students made a claim about the function. each student’s claim is below. jeremiah: the y-intercept is at (15, 0). lindsay: the x-intercepts are at (–3, 0) and (5, 0). stephen: the vertex is at (–4, –1). alexis: the midpoint between the x-intercepts is at (4, 0). which student’s claim about the function is correct?

If you answer right ill give brainliest, : )

Arestaurant added a new outdoor section that was 8 feet wide and 6 feet long. what is the area of their new outdoor section