Using exponential function concepts, we have that:
1. Growth.
2. Decay.
3. Growth.
An exponential equation has the following format:
[tex]y = ab^x[/tex]
- If [tex]b > 1[/tex], it represents growth.
- If [tex]0 < b < 1[/tex], it represents decay.
- For item 1, we have that [tex]b = 1.05 > 1[/tex], thus it is growth.
- For item 2, we have that [tex]b = 0.4 < 1[/tex], thus it is a decay.
- For item 3, we have that [tex]b = 10 > 1[/tex], thus it is growth.
A similar problem is given at https://brainly.com/question/23826896
