What kinds of triangles are the coldest ending with ssd

Which of the following is missing in the explicit formula for the compound interest geometric sequence below?

As a salesperson you get $53/day and $3.75/ each sal you make. if you want to make at least $128 in one day, how many sales would you need to make? a 10b 15c 20d 25

Click on the picture to look at some equivalent fractions. look at them closely. can you see a relationship of any kind between the two fractions in each pair? write what you notice below.