Sales tax was 7.5% how much did tammys lunch cost before tax if the tax on it was 0.72? define a variable and write an equation

The cost of Tammy lunch is 9.6 unit .

Step-by-step explanation:

Given as :

The percentage of sales tax = 7.5 %

The tax amount on cost = 0.72

Let the cost of Tammys lunch = x unit

So,

∵ The sales tax is applied on the cost

∴ 7.5 % of x = 0.72

Or, 0.075 × x = 0.72

Or, x =

∴    x  = 9.6 unit

Hence The cost of Tammy lunch is 9.6 unit .   Answer

i think it is c, not positive though

step-by-step explanation:

pi x^2

step-by-step explanation:

pi times x squared