27.5 because of you divide the 55miles with the time you get your velocity which is the speed.
A.is an example of decomposition reaction.
Freezing.................
Answer:
140m
70sec I cant show my work but I gave you a push
Explanation:
Brainliest?
The friction force is given by:

Where μ is the coefficient of friction (static or kinetic) and

is the normal force. So we say the friction force is directly proportional to the normal force with a constant of proportionality equal to the coefficient of friction.