all questions below. ????????+???????? 1. ???????? = is the formula for calculating: 2 A. Area of a trapezium B. Volume of trapezium C. Area of a triangle D. Area of a circle (2) 2. What is the volume of this liquid? A. 73ML B. 73 cm C. 75 ml D. 75 cm (2) 3. Which metric unit(s) of measurement measure volume? A. ml B. cm3 C. meters D. 2 or more of the above are true (2) 4. A survey of 15 females on a day of vaccination was as follows: 25; 74; 78; 57; 36; 43; 57; 89; 56; 91; 43; 33; 61; 67; and 52. Use this information to answer questions 4.1 to 4.3. 4.1 What do 57 and 43 in the above data represent? (2) 4.2 What does 57 in the above data represent? (2) 4.3 Calculate the mean age of the females vaccinated. (2) 5. The average mass of 50 pumpkins is 2,1 kg. If three more pumpkins are added, the average mass is 2,2 kg. What is the mass of the extra pumpkins? Show all working clearly and write your answer correctly to two decimal places. (4) 6. Rea Vaya bus 1 and Rea Vaya bus 2 start from Ghandi Square at the same time and travel in the same direction. If Rea Vaya bus 1 travels at 60 km/h and Rea Vaya bus 2 travels at 72 km/h, in how many hours will they be 60 kilometres apart. Show all working clearly. (5) 7. Two hikers start out on the Kilimanjaro Trail at the same time and walk in the same direction. If one hiker averages 2 kilometres per hour and the other averages 2.6 kilometres per hour, in how many hours will they have covered 16 and 20.8 kilometres respectively? Show all working clearly. (5) 8. Calculations and problem-solving involving mass at Grade 4 include: A. converting between grams and kilograms B. conversions should include fraction and decimal forms (to 2 decimal places) C. problems in contexts involving mass D. converting between grams and kilograms, limited to examples with whole numbers and fractions (2) 9. When working with the concept of time, in which grade within the Intermediate Phase do learners not use stopwatches as instruments? (2) 10. In which grade are learners expected to engage in calculations and problem-solving for time where the time is given in centuries, decades, and/or years? (2) 11. In Grade 6, what are the three units of measurement for volume? (2) 12. The heights (in centimetres) of Grade 9 learners were taken and recorded as follows: Use this information to answer 12.1 to 12.8 12.1 What is the maximum height? Write only the number. (2) 12.2 How many learners were involved? Write only the number. (2) 12.3 What is the modal height? Write only the number. (2) 12.4 What is the median of the heights? Show all workings. (2) 12.5 Calculate the mean of the heights of the learners. Show all workings and give your answer correct to two decimal places. (2) 12.6 Identify extreme values of the data. Write only the number/s. (2) 12.7 Delete one extreme value of the data at a time and recalculate the mean of the data to one decimal place. What do you notice about the original mean and the new mean? Write as follows: Decreased when ... is deleted, and increased when ... is deleted. (2) 12.8 Did the mode and the median change when you deleted the extreme value? Show all workings to arrive at your answer. (2)