Answer
Shortage of $11$ million rides per day.
Work Step by Step
We expect a shortage, because $\overline{\overline{Z}}\ 1.00$ is below the equilibrium price of $\overline{\overline{Z}}\ 2.00$.
When p=$1$,
Demand:$\quad\left[\begin{array}{l}
q=31(1^{-0.49})\\
q=31
\end{array}\right]\quad$ Supply: $\left[\begin{array}{l}
q=2.5(1)+17.5\\
q=20
\end{array}\right]$
The demand is $31-20=11$ million rides greater than the supply; that is, there is a
shortage of $11$ million rides per day.