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:
$2.10 - $2 = $0.10
The banana cost 10 cents.
Answer:
6 Feet of String.
Step-by-step explanation:
Marla is making 6 Bracelets
Given that each bracelet requires 1 foot of string
Therefore:
6 bracelets will require 6*1 foot =6 Feet of String.
She will need 6 Feet of String for the bracelets.
2.2(12)=26.4 the answer is 26.4lbs.