SOLUTION: The pressure (P) on a diver in the water varies directly as the depth (d). If the pressure is 2.25 psi when the depth is 5 ft, what is the pressure when the depth is 12 ft?

Algebra ->  Proportions  -> Lessons -> SOLUTION: The pressure (P) on a diver in the water varies directly as the depth (d). If the pressure is 2.25 psi when the depth is 5 ft, what is the pressure when the depth is 12 ft?      Log On


   

Question 1198795: The pressure (P) on a diver in the water varies directly as the depth (d). If the pressure is 2.25 psi when the depth is 5 ft, what is the pressure when the depth is 12 ft?
Found 2 solutions by josgarithmetic, mccravyedwin:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
The wording goes this way as the formula or equation:
P=kd

Now use the given information and answer the question presented.

Answer by mccravyedwin(406) About Me  (Show Source):
You can put this solution on YOUR website!
Instead of doing it for you, I'll do one exactly like it instead" 
The pressure (P) on a diver in the water varies directly as the depth (d). If
the pressure is 4.95 psi when the depth is 9 ft, what is the pressure when the
depth is 16 ft?

The pressure (P) on a diver in the water varies directly as the depth (d).

P=k%2Ad

If the pressure is 4.95 psi when the depth is 9 ft,

4.95=k%2A9

4.95%2F9=%28k%2A9%29%2F9

0.55=k

what is the pressure when the depth is 16 ft?

Substitute 0.55 for k in P=k%2Ad

P=0.55%2Ad

Substitute 16 for d

P=0.55%2A16

P=8.8

Answer: 8.8 psi

Now do yours the same way.

Edwin