Mrs. Palma took her coworkers out to dinner yesterday and their subtotal was $72.39 If the sales tax is 5% and she plans to leave a 20% gratuity after the tax it is added, how much will Mrs. Palma spend total on dinner?

A) $82.54
B) $86.87
C) $90.48
D) $91.21

C) $90.48

Step-by-step explanation:

72.39*.2=14.478

72.39*.05=3.6195

14.478+3.6195=18.0975

18.0975+72.39=90.4875

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints