check the answer in Google.
Answer:
The sign is negative (-)
Explanation:
it shows that heat was give off to the surrounding
C should be the correct answer
Please take this hepful hint :
F = m * a
6.2 = 2.3 * a
a = 2.7 m/s^2
Answer
7.53% 97% if you divide it you can get the answer
you too ^^
