1 cm cant equal 1 km
because 1km = 100 cms
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notice that the denominator can be factored into (x-3)(x+3).
Now you can cross out (x - 3) from the numerator and denomiantor resulting in a simplified fraction of 
Plug the limit value (which is 3) into the simplified fraction.
Answer: 
75 I think since 75 divided by 3 equals 25
we are given that
both sides are equal
so, their length must be equal


now, we can find other side


now, we can set them equal


now, we can take square both sides

now, we can solve for p




..............Answer