PLEASE HELP ME! Diagram shows the distance time graph that represent Dendrick's journey Kl to vawang and David s journey from rawang to Kl. Both of them depart from the place at the same time

a) Calculate the length of time in minutes, David stop his car

b) If their journey starts at 9 am, what is the time david and dendrick

c) Calculate the speed in km h¯¹, of Dendrick when he meets David​

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.