Total amount is 190.
Given:
Initial investment is, P = 100.
Rate of interest is, r = 5% = 0.05.
Number of years is, n = 18 years.
The objective is to find the interest amount after 18 years.
The interest amount can be calculated by the formula of,
[tex]A=P\cdot n\cdot r[/tex]Now, substitute the given values in the above equation.
[tex]\begin{gathered} A=100\cdot18\cdot0.05 \\ A=90 \end{gathered}[/tex]Thus, the interest after 18 years is 90.
Then the total amount in the savings account will be,
[tex]\begin{gathered} T=A+P \\ T=100+90 \\ T=190 \end{gathered}[/tex]Hence, the total amount in the savings account is 190.
