Ameasurement of 152.4 mm has 4 significant figures, because there are 4 digits. what about 152,400 mm? how many significant figures do you think it has

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Can you match these to the correct definition

If anyone who can me with this hw? i would really appreciate it