Question

The Guardians of the Galaxy updated their ship by purchasing a new chair for $172.46. They paid 9% sales tax on their purchase. How much did they pay total?

Answer 1

$187.98

1) Since the sale tax is 9%, and the price of the new chair is $172.46 we can calculate the full cost of that chair (price + sales tax) using the following formula:

`\begin{gathered} 172.46(1+0.09)= \\ 172.46(1.09)=187.9814\approx187.98 \end{gathered}`

Notice that 1 represents 100% and 0.09 that 9% into that formula.

Also, we had to round it off to the nearest hundredth since it is a currency ($).

2) Hence, the full cost for that chair and tax is $187.98