For dinner , mrs gutman ordered a salad for $12.75 and a soda for $1.50 .a) mrs gutman wants to leave a 20 % tip .how much is the tip? b) 8% tax is added to the cost of mrs .gutman's food .how much will she pay in tax ? c) what is the total amount that she will pay for dinner ? show your work

the tip is $2.85

the tax will be $1.14

the total including tip and tax is $18.24

Step-by-step explanation:

12.75+1.50=14.25 total before tax and tip

14.25+1.14=15.39 total including tax

14.25+2.85=17.10 total including tip

14.25+1.14+2.85=18.24 total including tax and tip

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation: