Answer:
i). [tex]\$ 7500[/tex]
ii).[tex]\$ 67500[/tex]
Step-by-step explanation:
Given in the question-
Saving rate is s(t)= 3000(t+2)
We know that savings in the 1st year can be calculated as
[tex]\int_{0}^{1}3000(t+2).dt[/tex]
[tex]3000\left [ \frac{t^{2}}{2}+2t \right ]_0^1[/tex]
[tex]3000\left [ \frac{1}{2}+2 \right ][/tex]
= [tex]\$ 7500[/tex]
So savings in the first 5 years can be calculated as
[tex]\int_{0}^{5}3000(t+2).dt[/tex]
[tex]3000\left [ \frac{t^{2}}{2}+2t \right ]_0^5[/tex]
[tex]3000\left [ \frac{25}{2}+5 \right ][/tex]
= [tex]\$ 67500[/tex]