[計量] 請教三題
1.
circular region C has a radius of 1 centimeter and a circumference
of x centimeters: if the region has an area of y square centimeters, what
is the ratio of x to y?
題目看的不是很懂
ans:2
2.
the numbers in a table are arrange in 10 rows and 4columns such that
one number is placed at the intersection of each row and column.
how many numbers are contained in the table?
也是看不太懂題目
ans:40
3.
(1):邊長為10的正方形
(2):邊長為50的正方形
(a)(1)/(2) (b) 0.004
比大小
他答案給依樣大= = 但我懷疑我的數學計算
1/25應該比0.004大吧
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