6. [-I2 Points] Two cars start from rest at a trafc light and accelerate for several minutes. The figure below shows their velocities as a function of time. (a) Estimate the distance traveled by car 1 during the rst minute. --Seiect- v feet (b)Estimate the time at which the two cars have gone the same distance. --Seiect-v minutes 7. {13 Points] Oil leaks out of a tanker at a rate of f(t) gallons per minute, where t is in minutes. Write a denite integral for the total quantity of oil (in gallons) which leaks out of the tanker in the rst five hours. dt 9. [I3 Points] The velocity functlon of an object ls glven below. Veloclty Is measured In feet per second and time Is measured In seconds. 4 0 S t S 180 v t = _ \" fu 180>+4 180