To determine the additional kilograms of rice needed by the restaurant, one would add up all the masses from the line plot, and then subtract from 35 kilograms. For the example with potatoes, the least precise measurement is 13.7 kg which is to the tenth place, Therefore, after addition and subtraction, the final mass of potatoes is rounded to the tenth place, thus obtaining 15.2 kg.
To find out how many more kilograms of rice the restaurant needs, we first need to know the total mass of the rice they currently have. Since we do not have the exact numbers from the line plot provided in the student's question, we can only offer a generic method for solving it. Generally, you would add up the masses of all the bags of rice shown on the line plot. Let's assume this total is X. You would then subtract X from the desired total mass, which is 35 kilograms, to determine how many more kilograms are needed:
35 kg - X kg = Additional kilograms needed.
When adding or subtracting with precision in measurements, the result should have the same number of decimal places as the least precise measurement. For example, if we buy 7.56 kg of potatoes (precision 0.01 kg), drop off 6.052 kg of potatoes (precision 0.001 kg), and add 13.7 kg of potatoes (precision 0.1 kg), the least precise measurement is 13.7 kg which is to the tenths place.
Adding the masses gives:
- 7.56 kg
- + 13.7 kg
- - 6.052 kg
The sum is 15.208 kg before considering significant figures or precision. Since the least precise measurement was to the tenth place, we round our answer to the tenth place, which gives:
15.2 kg
This is how you would correctly calculate the new potato mass while considering significant figures and measurement precision.