Question

The function A(t)=525(1+0.05)^t represents the amount of money in the account after t years. How much more money did Taber originally invest?

Answer 1

The amount of money originally invested corresponds to the amount of money at time t=0, so we can find it by putting t=0 inside the equation of A(t):
$A(t)=525(1+0.05)^t$
So, using t=0
$A(0)=525(1+0.05)^0=525 \cdot 1 = 525$

So, the amount of money originally invested by Taber is 525.