The pressure on a scuba diver at sea level is 14.7 pounds per square inch (psi). The pressures increases 0.445 psi for each foot of depth. Suppose the pressure on a diver is 32.5 psi. How deep is he? Algebra
Let x be the depth of the diver. The pressure on the diver is 14.7 + 0.445x.
We can set up the equation:
14.7 + 0.445x = 32.5
Subtracting 14.7 from both sides:
0.445x = 17.8
Dividing both sides by 0.445:
x = 40
The diver is 40 feet deep.