Find the area of each figure. Round your answers to the nearest hundredth 7-10​

275/20 simplified (lmbo it told me to add more characters)

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?