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Because the results we get when we calculate measurements are estimated or rounded up as some people say, so being around the true answer is called accurate. Also, the devices we use to measure ( scales are an example of this) are never actually perfectly precise in how they are set, plus they are not completely clean which can change your answer. this change would not seem to be alot though it's not the true or exact answer.
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How are fractions expressed when working with metric numbers?
The question is poorly stated: the point being uncertain as there is no such thing as "metric fractions". My best guess would be that the question is"How are fractions expressed in the metric system?".If so, here is the answer:The metric system is a decimal system. Therefore, all measurements, including fractional parts ("fractions") of its units, are always expressed as decimals.
Exterior angle of a heptagon?
51.428571° is the measure of an exterior angle of a heptagon. You can always find the measurements of a regular polygon by dividing 360 by the amount of sides.
Is the phythagorean theorem the exact measurement?
Yes, the Pythagorean theorem gives the exact measurements always. It can be backed up by proofs and sin, cosine, etc.
Is 1 liter equal to 100mL?
No, a litre is 1000mL. mL stands for millilitres, and although milli is like million, when it comes to measurements it is always thousandths (like millimetres).
What term refers to all the certain digits and one uncertain digit in a measurement?
A term Significant Figure refers to all the certain digits and one uncertain digit in a measurement.
