Question
The sides of a rectangle are 6.3 cm and 4.8 cm, each correct to 1 decimal place.
Calculate the upper bound for the area of the rectangle.
Answer/Explanation
Ans: 30.7975 cao
Question
A large water bottle holds 25 litres of water correct to the nearest litre.
A drinking glass holds 0.3 litres correct to the nearest 0.1 litre.
Calculate the lower bound for the number of glasses of water which can be filled from the bottle.
Answer/Explanation
Ans: 70
Question
On a mountain, the temperature decreases by 6.5 °C for every 1000 metres increase in height.
At 2000 metres the temperature is 10 °C.
Find the temperature at 6000 metres.
Answer/Explanation
Ans: -16