The equation of line ab is (y−3) = 5 (x − 4). what is the slope of a line perpendicular to line ab?

Answer these questions showing your work plz

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Which is greater, 7 p 5 or 7 c 5? 7p5 7c5