Sara went to lunch with her friends .the sandwhich she bought cost 4.95 if the tax rate was 7.5% what is the total cost

Total cost = $5.32125

Explanation:
Total cost = cost of sandwich + taxes

We know that:
cost of sandwich = $4.95
Tax rate = 7.5%

We will get the taxes as follows:
taxes = 7.5% of the price of sandwich
taxes = 7.5% * price of sandwich
taxes = 7.5% * 4.95
taxes = 0.075 * 4.95
taxes = $0.37125

Now, we can get the total cost as follows:
Total cost = cost of sandwich + taxes
total cost = 4.95 + 0.37125
total cost = $5.32125

Hope this helps :)