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3. question 20 the marks of 10 students in a physics...

# Question: question 20 the marks of 10 students in a physics...

###### Question details

Question 20. The marks of 10 students in a Physics exam are shown. 44, 53, 54, 54, 59, 60, 61, 62, 73, 75

(i) Find the interquartile range.

Question 21 (11 marks)

a) Simplify: 3𝑎 2𝑏 × 5𝑎𝑏

b) If the cost of electricity is 28.9 cents/kWh, calculate the cost of 720 kWh.

c) In a flavoured milk drink, the ratio of milk to flavour in a drink is 7:2.

i) How much flavour is needed if the drink is to contain 2.8 L of milk?

(ii) The internal dimensions of a drink container in the shape of a rectangular prism 2 are 12 cm by 9 cm by 5 cm. To completely fill the container with the flavoured milk, how many litres of flavour are required? ............................................................................................................................... ............................................................................................................................... ............................................................................................................................... ..............................................................................................................................