Answer
$1.193$
Work Step by Step
In an exponential model $F(t)=Ab^{t}$, the value for $F(t+1)$ is obtained by multiplying $F(t)$ with b.
The blank should be $b=1.193$
Calculation:
$\displaystyle \frac{F(t+1)}{F(t)}=\frac{Ab^{t+1}}{Ab^{t}}=b$