Find the Measure of side C, please help

Which of the following equations is of the parabola whose vertex is at (4, 3), axis of symmetry parallel to the y-axis and focus at (4, -3)? a.) y+3=1/24 (x+4)^2 b.)y-3=-1/24 (x-4)^2 c.)x-4=-1/24 (y-3)^2

Prove that 16^4-2^13-4^5 is divisible by 11.

Check image and write the letter of the answer