The answer is 14.3%
because if u times it by 7 u get 100 because there is 1/7 percent chance it it will be sunday then any other day of the week
20% of 89.75 is 17.95

so :

the Trina's coupon will subtract the answer by 10%:
10%of 71.8 is 7.18

so the final answer is:

she has to pay $64.62
hope this helps
Each angle is 90 degrees because 90 times 3 is 270.