1)Find the approximate value of the area of a circle with radius equal to 8.2cm.
2)There is 845658756 people in a country.Express this in scienticific notation correct to 1 sig.fig.
maths
2007-09-24 12:42 am
回答 (2)
2007-09-24 2:05 am
✔ 最佳答案
1)Area of the circle =8.2x8.2x3.14
~~8x8x3
=252
2)845658756
=800000000 ( cor. to 1 sig.fig. )
2007-09-24 7:11 pm
1)Find the approximate value of the area of a circle with radius equal to 8.2cm
area = pie x r x r
= 3.14 x 8.2 x 8.2
= 211.134
2)There is 845658756 people in a country.Express this in scienticific notation correct to 1 sig.fig.
800000000
area = pie x r x r
= 3.14 x 8.2 x 8.2
= 211.134
2)There is 845658756 people in a country.Express this in scienticific notation correct to 1 sig.fig.
800000000
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