Question

The tax on a $70 item is $4.20. Find the tax on a $90 item.

Answer 1

$5.40.

Step-by-step explanation:

Let the tax on the $90=y

Expressing the problem as a ratio gives:

`(90)/(70)=(y)/(4.20)`

Solve for y:

`\begin{gathered} y=(90)/(70)*4.20 \\ =5.40 \end{gathered}`

The tax on a $90 item is $5.40.