A company grows microscopic algae in transparent tanks. The tanks receive daylight and their temperature is kept near the optimum for photosynthesis.

The company tests different combinations of artificial lighting and carbon dioxide concentration. The algae are harvested as dry biomass, which is sold for $\pounds 4.00\,$ per $kg\text{kg}$ .

Artificial lighting used	Carbon dioxide concentration in %	Dry biomass produced in $kg\text{kg}$ per week	Cost of lighting in $\pounds\,$ per week	Cost of carbon dioxide in $\pounds\,$ per week
No	0.04	400	0	0
No	0.10	400	0	180
Yes	0.04	470	300	0
Yes	0.10	600	300	180

All other weekly costs are the same for every combination.

Evaluate which combination of artificial lighting and carbon dioxide concentration the company should use to maximise weekly sales income after subtracting the lighting and carbon dioxide costs. Use calculations and your knowledge of limiting factors.

A company grows microscopic algae in transparent tanks. The tanks receive daylight and their temperature is kept near the optimum for photosynthesis.

The company tests different combinations of artificial lighting and carbon dioxide concentration. The algae are harvested as dry biomass, which is sold for $\pounds 4.00\,$ per $kg\text{kg}$ .

Artificial lighting used	Carbon dioxide concentration in %	Dry biomass produced in $kg\text{kg}$ per week	Cost of lighting in $\pounds\,$ per week	Cost of carbon dioxide in $\pounds\,$ per week
No	0.04	400	0	0
No	0.10	400	0	180
Yes	0.04	470	300	0
Yes	0.10	600	300	180

All other weekly costs are the same for every combination.

1.4 Photosynthesis

Question 22

Markscheme

1.4 Photosynthesis

Question 22

Markscheme

1.4 Photosynthesis

Question 22

1.4 Photosynthesis Questions

1.4 Photosynthesis

Question 22

1.4 Photosynthesis Questions