# The equation #P = 1 + d/33# gives the pressure, #P#, in atmospheres (atm) at a depth of #d# feet in the sea. For what depths #d# is the pressure at least 1 atm and at most 7 atm?

##### 1 Answer

Jan 7, 2017

#### Explanation:

The formula is

#color(blue)(bar(ul(|color(white)(a/a) P = 1 + d/33color(white)(a/a)|)))" "#

We can do some rearranging to get:

#color(blue)(bar(ul(|color(white)(a/a) d = 33(P - 1)color(white)(a/a)|)))" "#

**When #P = "1 atm"#,**

**When #P = "7 atm"#,**

∴ The pressure is at least 1 atm and at most 7 atm when the depth ranges from 0 ft to 200 ft.