1. Without the ring Eiko healing spell restores H health points. This is 100%. After wearing the magic ring her power is increased by 30% and became X. Use proportion
H - 100%
X - 100%+30%=130%
to find X:
[tex]\dfrac{H}{X}= \dfrac{100}{130},\\ \\100\cdot X=H\cdot 130,\\ \\X=\dfrac{130H}{100}.[/tex]
This is answer form option B.
2. If without the ring Eiko healing spell restores H health points, then you can treat H as the whole 1·H. After wearing the magic ring her power is increased by 30%, that is [tex]\dfrac{30}{100}=\dfrac{3}{10}[/tex] from 1. Now with the ring Eiko healing spell restores[tex]\left(1+\dfrac{3}{10} \right)H[/tex] health points. This is answer C.
Answer: correct options are B, C.
