Answer:
(a)0.3 kg (b)1 kg (c)0.5l
Step-by-step explanation:
Part 1.1.1
![\begin{gathered} 1000g=1\operatorname{kg} \\ 1g=(1)/(1000)kg \\ \implies300\text{grams}=300*(1)/(1000)kg \\ =(300)/(1000)kg \\ =0.3\operatorname{kg} \end{gathered}]()
Part 1.1.2
The recipe calls for 400g of tomatoes for 2 people.
Since Jane's family consists of 5 people (including herself):
![\begin{gathered} (2)/(400)=(5)/(x) \\ 2x=5*400 \\ x=(5*400)/(2) \\ x=1000g \\ x=1\operatorname{kg} \end{gathered}]()
Jane will need 1 kg of tomatoes to make this recipe for her family.
Part 1.1.3
Next, we convert 500ml to liters.

500ml is 0.5 liters.
Part 1.1.4
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