Question

7.3 x 10^-4 mL/s to cubic feet per day

Answer 1

Note that
1 L = 3.53147 x 10⁻² ft³, therefore
1 mL = 3.53147 x 10⁻⁵ ft³
1 day = 86400 s

Perform the conversion.
$7.3 \times 10^{-4} \, \frac{mL}{s} \\ = (7.3 \times 10^{-4} \frac{mL}{s} )*(3.53147 \times 10^{-5} \, \frac{ft^{3}}{mL} )*(86400 \, \frac{s}{day} ) \\ = 1.763 \times 10^{-3} \, \frac{ft^{3}}{day}$

Answer:  1.763 x 10⁻³ ft³/day