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Mathematics 15 Online
OpenStudy (anonymous):

A square has a side of 6.25 feet. What is the area in square feet? Round to the correct significant digits.

OpenStudy (jack1):

|dw:1379613352208:dw|

OpenStudy (jack1):

so whats the equation for area of a square? @pony123 ?

OpenStudy (anonymous):

wxh?

OpenStudy (jack1):

...? How do u work out the area of a shape?

OpenStudy (anonymous):

width x height

OpenStudy (jack1):

yep, perfect but a square has equal width and height (in this case both are 6.25) so the area of this square is?

OpenStudy (anonymous):

so the answer would be 39.0625 or just 39?

OpenStudy (anonymous):

or 39.1

OpenStudy (jack1):

neither, as you're using significant figures, you still use rounding so 3 sig figs in workings = 3 sig figs in answer so 39.1 (the 0.06 is rounded up)

OpenStudy (anonymous):

ok thank you!

OpenStudy (jack1):

all good dude, yw

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