What does this symbol mean, and which safety precaution must be taken when it is present?

d

explanation:

the higher the instrument the better

acceleration= v2-v1/t so 8m/s-3m/s / 3s =to 8/3 or

2.67 m/s^2

hope i

-lavira: )

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

hope this any more questions i am here plz mark brainliest

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!