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:
Answer: is 3
Step-by-step explanation: this is because you need to divide the two numbers and 3 go into 5 and 15.
Answer:
200 pieces
Step-by-step explanation:
20+60+120=200
Answer:
Step-by-step explanation:
20 is the value