calculus
posted by Courtney .
Find the number b such that the line y = b divides the region bounded by the curves y = 16x2 and y = 9 into two regions with equal area. (Round your answer to two decimal places.)

Find the area of the region bounded by the parabola y = 4x^2, the tangent line to this parabola at (4, 64), and the xaxis.