Distance, since distance represents how far something has travelled, which would be in our case 2.5m.
Nevermind that one i dont know sorry
Answer:
108 extended days
Explanation:
Regular school hours a day = 6 hr
No. of school days to make up by extending the regular hours = 3 days
Amount of time added to the regular hours of school = 10 min
No. of extended school days to make up the 3 school days by following the above mentioned criteria be x.
Time of school hours in 3 days = 

are required to make up 3 days of school having 6 hours of regular timing with 10 minutes of add-on time each day.
laser in the garage . . . D
wavelength of a sound . . . C
how sound travels . . . B
electromagnetic spectrum . . . D