Induced emf = -NA (ΔФ/Δt)
N = 1 (assuming its 1 loop), ΔФ = 0.2-0 = 0.2 T, Δt = 0.3 sec, A = 0.12 m^2
Therefore,
Induced emf = -1*0.12*(0.2/0.3) = -0.08 V
Unit rate: 20$ per ounce of silver
Under silver it says ounces btw
Don't get confused with the second pair of brackets - you must apply the negative sign on the outside to all the signs on the inside, which now gives:
Now just take away the brackets and collect like terms to get:
This problem would just be x + (x +7) = 25. It can be simplified to 2x = 18, which can be further simplified to x = 9. 9 is one of your answers. To find the other number, just add 7. Your numbers would be 9 and 16, which do add to 25.