业务种类 | 计费单位 | 资费标准 (元) | 挂号费 (元/封) | 特制信封 (元/个) |
挂号信 | 首重100g内,每20g | 0.8 | 3.0 | 0.5 |
续重101g—2000g 每100g | 2.0 | |||
特快专递 | 首重1000g (含1000g) | 5.0 | 3.0 | 1.0 |
|
(1) 质量为90g的信若以“挂号信”方式寄出,邮寄费为多少元?若以“特快专递”方式寄出呢?
(2) 这五封信分别以怎样的方式寄出最合算?请说明理由.
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