月份 | 1月 | 2月 | 3月 | 4月 |
用水量/吨 | 8 | 10 | 12 | 15 |
应缴水费/元 | 16 | 20 | 26 | 35 |
(1)每月用水量的规定吨数是
(2)基本标准是每吨收费
(3)超过规定吨数部分的标准是每吨收费
(4)如果小明家5月份用水20吨,那么应缴水费
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