Please help m

On September 22, Illuminations Lighting Center sold $6,400 in merchandise on account to Sunshine Builders, a charge customer. A 5% sales tax applied to the sale. The date of the sales slip was September 22, and the credit terms were 2/10, n/30. What is the last day Sunshine Builders can pay the invoice and still receive a discount?

answer: the 4 kilogram bag

step-by-step explanation: this is because if you divide the number of kilograms into the total it will tell you how much each individual kilogram would be worth. 2 kilos is 7 and change 3 would be around 6 ish and the 4 kilo would be 4.6 and change and the 5 kilos would be like 4.88

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.

i think the answer is d im not sure