A leafy shoot was placed in a potometer to measure the rate of transpiration under controlled laboratory conditions. The graph below shows the cumulative volume of water uptake by the shoot over a 6-hour period between 08:00 and 14:00.
Determine the rate of water uptake at 11:00 using the tangent line shown.
Give your answer:
- in mm3 per minute\text{mm}^3\text{ per minute}mm3 per minute
- in standard form.