Answer:
- 1) 4812 students
- 2) 763 pounds
- 3) $30906.76
Step-by-step explanation:
1)
- Initial number = 2988
- Rate of increase = 10%
Number of students after 6 years:
- [tex]a_6 = 2988(1+0.1)^{6-1} = 4812[/tex]
2)
- Initial number = 1200
- Rate of decrease = 14%
Amount of gold after 4 years:
- [tex]a_4=1200(1-0.14)^3 = 763[/tex]
3)
- Initial number = 28000
- Rate of increase = 2.5%
a)
Salary after n years:
- [tex]a_n=28000(1+0.025)^{n-1} = 28000*1.025^{n-1}[/tex]
b)
Salary in the 5th year:
- [tex]a_5=28000*1.025^4 = 30906.76[/tex]
