For this case we have the following equation:

Where,
w: The weight of a spring in pounds
E: the energy stored by the spring in joules.
Substituting values we have:

Making the corresponding calculation:
Answer:
the approximate weight of the spring in pounds is:
how many pounds does he feed his dogs for each meal?
Answer:
You can have it as a decimal (0.6 repeatings), or you can have it as a fraction. It would be easier to keep it as a fraction.
Step-by-step explanation:
p=1/d
6=k/9
6×9=k
54=k
2=54/d
2×d=54
d=54/2
d=27
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