13. Average speed is calculated by: a. Time divided by distance b. Distance divided by time c. Distance multiplied by time d. Time squared divided by distance 14. In scientific notation, 0.00302 is written as: a 3.02times 10^wedge -2 b 3.02times 10^wedge -3 C 3.02times 10^wedge -4 d 3.02times 10^wedge -5 15. Which SI base unit represents amount of substance? a. Mole b. Gram c. Kilogram d Candela

13. The correct answer is b. Distance divided by time. Average speed is calculated by dividing the total distance traveled by the total time taken.14. The correct answer is b. . In scientific notation, 0.00302 can be written as .15. The correct answer is a. Mole. The SI base unit that represents the amount of substance is the mole.