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How many 8x5 pavers needed for 220 square feet?
792 would be what calculates but it depends on the exact measurements of the 220 square feet.
1 penny weight equals how many grams when selling gold?
1 pennyweight = 1.555 grams Check the link provided for exact measurements.
Is it appropriate to estimate numeric measurements in a scientific investigation?
No because you have to have the exact measurement to be correct, what if someone were to come back and redo your experiment and then had a different outcome?
Why is it important to have exact standards of measurements?
In short, without exact standards of measurement, no one could speak of the same amount of a thing. For example, imagine you're trying to bake a cake. The recipe calls for 3 "bunches" of flour. Now you are totally confused because you don't know how much flour to use, because a "bunch" of flour is not an exact standard of measurement. Or maybe you go to the bank and tell them you'd like to deposit "a lot" of money. Hopefully you can see that both of these situations (although ridiculous) are lacking in exact standards of measurement. This can be applied to more scientific areas. For instance, if you are recording an experiment for other scientists to also study and verify, you must use exact measurements.
Why do you need standard measurements?
We need standard measurements because it helps us to find the measurements of things.
