Answer :
[tex]O=100\cdot3^{\tfrac{3\cdot5}{5}}\\
O=100\cdot3^3\\
O=100\cdot27\\
O=2700\\\\
4.2 \text{ mph}\approx6.16\dfrac{\text{ft}}{\text{s}}\\
O=100\cdot3^{\tfrac{3\cdot6.16}{5}}\\
O=100\cdot3^{3.7}\\
O=100\cdot58.3\\
O=5830[/tex]