The average rate of change for f (x) = 3x2 43:: over the interval [1.3] is: a. 2 c. 4 b. 8 d. 1 1 A birthday balloon is being lled with helium. The table on the right shows the volume of helium in the balloon, V in cm3 , at time t, in 3-second intervals for 30 seconds. What is the average rate of change of the volume with respect to time in the interval from 6 s to 15 s? a. 489.3 cm3/s c. 54.4 cm3/s b. 18.1 cm3/s d. 72.6 cm3/s Evaluate the limit if it exists: lim '/ 3(x 2): x>2 a. 6 c.3 b. 0 (1. Does not exist