2. Which of these helps to avoid muscle injuries while exercising? A:exercising vigorously when muscles are stiff to warm them up
B:slowly and gently stretching muscles before hard exercise
C. pushing through exercise with hurt muscles
D;bursting into hard activity after being still for a while

no

explanation:

go away, people want answers, not to hook up

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

that's what i got you can count the number of atoms