Answer:
Height of tree = 78.35 meters.
Explanation:
We have
1 meter = 3.28 feet
That is

Here height of tree = 257 ft
Height of tree = 257 x 0.3048 = 78.35 m
Height of tree = 78.35 meters.
The answer would be . Since we are looking for the spring constant you would need to use the formula

. Then you'd substitute, for PEs and x.

Then solve. k=500n/m
The answer is D. The current is measured on Amperes or Amps