Final answer:
Denise gives each plant 9 liters of water.
Step-by-step explanation:
To find out how much water Denise gives each plant, we need to divide the total amount of water she has by the number of plants. Denise has 38 liters of water and pours an additional 34 liters, which gives her a total of 38 + 34 = 72 liters of water in the container. If Denise gives all 8 plants the same amount of water, we divide the total amount of water by the number of plants: 72 liters ÷ 8 plants = 9 liters of water per plant.