Answer:
$13.85
Step-by-step explanation:
If the textbook decreases by 11% per year, this means it will be 89% of the previous year's value since 100% - 11% = 89%
89% in decimal form = 89/100 = 0.89
Therefore, the exponential function is:
, where is the number of years
So when ,
Answer: 23
Step 1. 30-6=24
Step 2. 24-3=21
Step 3. 21+2=23