A=4cm b=6.5cm c=9.2cm what is the approximate measure of angle a

Josephine has a great garden with and area of 2x2 + x - 6 square feet

Two cars which are 40 miles apart start moving simultaneously in the same direction with constant speeds. if the speed of the car which is behind is 56 mph and the speed of the other car is 48 mph, how many hours will it take for the car which is behind to catch up the car ahead of it?

Car a and car b were in a race .the driver of car b claimed that his car was twice as fast as car a