The acceleration is 
Explanation:
This is a uniformly accelerated motion (constant acceleration), therefore we can apply the following suvat equation:

where
v is the final velocity
u is the initial velocity
a is the acceleration
t is the time
For the scooter in this problem, we have
u = 0 (it starts from rest)
v = 10.0 m/s is the final velocity
t = 4.0 s is the time interval
Solving for a, we find the acceleration:

Learn more about acceleration:
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The mitochondria is the powerhouse of the cell because it takes nutrients and breaks it down to provide energy for the cell.
I would say C i'm not 100% sure
Answer:
“We have a brain for one reason and one reason only, and that's to produce adaptable and complex movements,” stated Wolpert, Director of the Computational and Biological Learning Lab at the University of Cambridge. ... The evidence for this is in how well we've learned to mimic our movements using computers and robots.
This is possible due to self-discharge. Very small internal currents inevitably occur in these cells over time and they will eventually exhaust the chemistry.