A city has a 5% sales tax. A book costs $32.55 after tax.

How much did it cost before tax?
*please answer quick and tell me how you did it*

$30.92

Step-by-step explanation:

First step is to turn 5% into a decimal so that you can use it easier in a math sentence -- 0.05

Next, find out what 5% of $32.55 is by multiplying

0.05 x 32.55

= 1.6275

Round to the nearest cent because we don't use anything smaller than a cent when we are talking about money.

= $1.63

This is the amount of tax included in the price of $32.55

If we want to know what it the book cost before tax we simply take the tax off.

$32.55 - $1.63

= $30.92

Hope that helps :)

Step-by-step explanation:

use pythagoras theorem for finding the height

hypotenuse is 8cm

base is 4 cm

height?

a^2+b^2=c^2

64-16=a^2

a=7.07cm

Height of equilateral triangle is 7.07cm