bumblebee123
Junior Member
- Joined
- Jan 3, 2018
- Messages
- 200
Hi,
I have been struggling with calculations involving lower and upper bounds. I understand how to find out the bounds but when given a calculation my answers are always incorrect for example:
Sinead ran 68m to the nearest meter. Her time for the run was 9.8 seconds to the nearest tenth of a second. Calculate the upper bound for her average speed in m/s.
To answer I take the upper bound for distance and time then use the speed= distance/time
upper bound for distance: 68.5
upper bonder for time 9.85
68.5/9.85 = 6.9543...
However, the answer is : 7.02564
Can someone tell me where I am going wrong? Some questions I am getting right, most questions I get wrong, yet I use the same method. Thank you all in advance.
I have been struggling with calculations involving lower and upper bounds. I understand how to find out the bounds but when given a calculation my answers are always incorrect for example:
Sinead ran 68m to the nearest meter. Her time for the run was 9.8 seconds to the nearest tenth of a second. Calculate the upper bound for her average speed in m/s.
To answer I take the upper bound for distance and time then use the speed= distance/time
upper bound for distance: 68.5
upper bonder for time 9.85
68.5/9.85 = 6.9543...
However, the answer is : 7.02564
Can someone tell me where I am going wrong? Some questions I am getting right, most questions I get wrong, yet I use the same method. Thank you all in advance.