(a)(i) Ans: Wednesday
The lowest temperature was −3°C on Wednesday.
(a)(ii) Ans: 5°C
Difference: 2°C (Tuesday) − (−3°C) (Wednesday) = 5°C
(a)(iii) Ans: −3, −2, −1, 0, 1, 2, 5
Ordered temperatures: −3°C, −2°C, −1°C, 0°C, 1°C, 2°C, 5°C
(a)(iv) Ans: −6°C
Sunday: −2°C
Next day: −2°C − 4°C = −6°C
(b) Ans: 2,000,000
1,935,364 rounded to nearest million: 2 million (since 935,364 ≥ 500,000)
(c) Ans: 115 ≤ h < 125
120m to nearest 10m means: 115m ≤ h < 125m
(d) Ans: 28.3 m²
Shaded area = Area of square − Area of circle
= (8×8) − (π×4²) = 64 − 16π ≈ 28.3 m²
