Delaney gave her nail technician a $5.10 tip. The tip was 5% of the cost of the manicure. Write an equation to find b, the cost of the manicure. If all percents are expressed as decimals, the equation nothing can be used to find b, the cost of the manicure.

Eiko is wearing a magic ring that increases the power of her healing spell by 30%30\%30%30, percent. without the ring, her healing spell restores health points. which of the following expressions could represent how many health points the spell restores when eiko is wearing the magic ring?