Question

The electric guitar that is on sale for $315 has an 8% sales tax applied at checkout. Which equation shows the total cost, c, after sales tax is applied?

Answer 1

Initial Price = p = 315$

sales tax = r = 8% of total price.

Tax amount = a = r/100 * p

a = 8/100 * 315

a = 126/5 = 25.2

The final cost (c) would be the sum of the initial cost (p) and sales tax (r). Therefore, we can write this equation as:

$c=p+\frac{r}{100}\cdot p$$c=p+a,\text{ as (a = }\frac{r}{100}\cdot p\text{)}$$c=315+25.2$$c=340.2$