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A circle with a radius of 4 units has a circumference of 25.13 units.
There is a big difference between height and elevation. Height is how tall something is. Elevation is how far above sea level something is.
hi, 324 ft (99 m) is the elevation of Albany
As we read the question, we sketched it out here on our yellow pad. We got 100 degrees for angle 'bec', but we have no confidence in that result, because we're not at all sure that our sketch is the only possible one that fits the details in the question. We're pretty sure that this is another case where we really need to see the labeled drawing described in the question before we can tease out any reliable answer.
Do you have a number you want to round? Look at the 100's digit ( the second to the left of the decimal point). If it is 5 or more, add 1 to the thousands digit (the next one to the left). Now replace the tens and units digits with zeros (and drop any numbers after the decimal point).