Answer:
13 (c)
Step-by-step explanation:
Graph the equation 7000(1-0.19)^x and then the inequality y<500, the point of intersection should be 12.524, so the answer will be rounded up to 13 i think
D. 13
Let the exponential function be
We substitute (0,9) to get:
The equation now becomes:
We substitute (3,72) to get:
The equation is therefore
All those words! Just use math.
1) a, the first printer
2) b, the second printer