I1.1 If $N(t)=100 \times 18^{t}$ and $P=N(0)$, find $P$.
I1.2 A fox ate $P$ grapes in 5 days, each day eating 6 more than on the previous day. If he ate $Q$ grapes on the first day, find $Q$.

I1.3 If $Q \%$ of $\frac{25}{32}$ is $\frac{1}{Q} \%$ of $R$, find $R$.
I1.4 If one root of the equation $3 x^{2}-a x+R=0$ is $\frac{50}{9}$ and the other root is $S$, find $S$.
$\begin{array}{l}P=100 \times 18^{0}=100 \\ Q+(Q+6)+(Q+12)+(Q+18)+(Q+24)=P=100 \\ 5 Q+60=100 \\ \Rightarrow Q=8 \\ \frac{25}{32} \times \frac{8}{100}=R \times \frac{1}{100 \times 8} \\ \Rightarrow R=50 \\ \frac{50}{9} \times S=\text { product of roots }=\frac{R}{3}=\frac{50}{3} \\ \Rightarrow S=3\end{array}$