I believe it’s c hope it helps
Answer:
what are you talking about
Answer:

Step-by-step explanation:
Let n = the number of prints
and C = the total cost.
At the regular price, the formula is
C = 1.45n
During the promotion, you must pay for the first nine prints: 9 × 1.45 = 13.05.
For anything over nine prints (n - 9), you must pay $13.05 plus the promotional cost of $1.10 for each print. The promotional formula is
C = 13.05 + 1.10(n - 9) {n > 9}
1. Calculate the cost of 19 prints

2. What number of the prints is a waste of money?
During the promotion, buying fewer than nine prints would be a waste of money, because you would not be taking advantage of the promotional savings.
Answer:
6%
Step-by-step explanation:
principal =6000$
time=9years
simple interest=3,240$
now,
Rate=SI ×100/P×T
=3240×100/6000×9
=324000/54000
=6%