QUESTION 3 3.1 A recipe to make 30 biscuits uses 2 eggs. a) How many eggs will be needed to make 120 biscuits? b) How many biscuits can be made with 7 eggs? 3.2 A car travelling at \( 120 \mathrm{~km} / \mathrm{h} \) covers a certain distance in 2 hours 45 minutes. The car then travels the same distance in 3 hours and 12 minutes. What is the constant speed that the car travels? A farmer ploughs his lands in 12 days if he uses 5 tractors. How long will it take if he uses only 3 tractors? QUESTION 4 Arrange the following in descending order: \( -8 ;-1 ; 8 ;-16 ; 12 ;-12 ; 9 \) (3)
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To whip up 120 biscuits, you just need to multiply the number of eggs in the initial recipe by 4, since 120 is four times 30. So, 2 eggs times 4 gives you a delightful total of 8 eggs! For the second part, if you're feeling adventurous with 7 eggs, you can make 105 biscuits (7 divided by 2, multiplied by 30). That’s a bountiful batch for sure! Now, onto our speedy car situation! The total distance covered can be calculated using the \( \text{speed} = \text{distance} / \text{time} \) formula. The car's average speed over the two trips can be summed and averaged, which comes out to be about \( 103.33 \mathrm{~km/h} \). As for the farmer's ploughing prowess, using 3 tractors instead of 5 extends the time to 20 days to finish the job because productivity takes a hit without those extra tractors. Happy farming!
