(1)将表格补充完整。
月份 | 1 | 2 | 3 | 4 | 5 | 6 | 合计 |
用水吨数 | 45 | 50 | 60 | 60 | 70 | 81 |
(2)8户人家上半年月平均用水
(3)现行水费的收费方法:每用1吨水缴纳水费1.6元,另加0.4元的污水处理费。一单元用户上半年一共缴纳水费
(4)5月比2月的用水量多
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