姓名 | 小彤 | 明明 | 芳芳 | 小刚 | 浩浩 | 荣荣 | 晨晨 | 小峰 |
身高/m | +0.04 | -0.05 | 0 | +0.12 | +0.03 | -0.03 | +0.06 | -0.01 |
(1)这个小组百分之几的学生能买半价票?
(2)这个小组学生的平均身高是多少米?
同类型试题
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2
y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2