Luigi jumps straight upwards 15.0m/s. how high is he when he is jumping at : 8.0 m/s upwards

Given: Initial velocity

           Final Velocity

To find : Height when jumpled 8.0 m/s upwards.

Solution: We already have values of initial velocity and final velocity.

We know, accereration due to gravity is given by .

It's negative because when jump it's in opposite direction.

Where h is the height when jumpled 8.0 m/s upwards.

Plugging values of

64= 225 -19.6h

Subtracting both sides by 225.

64-225= 225 -19.6h-225.

We get,

-161 = -19.6h

Dividing both sides by -19.6, we get

h= 8.2143

Rounding to nearest tenth, we get

h= 8.2 meter.

His height is 8.2 meter when he is jumping 8.0 m/s upwards.

layer a is the exosphere and layer b is the thermosphere.   is the answer i think but i hope this .