Question

Please help me. I don’t understand this problem.

Answer 1

637 feet

Explanation:

`P=14+\frac6{13}d\\\\\\P=308\,,\qquad\qquad d=??\\\\\\308=14+\frac6{13}d\\\\ 308-14=\frac6{13}d\\\\294=\frac6{13}d\\\\d=294:\frac6{13}\\\\ d=294\cdot\frac{13}6\\\\d=637\,ft`

Answer 2

d = 637 ft below the surface

Explanation:

Given

P = 14 +
`(6)/(13)` d

To find d when P = 308, then

14 +
`(6)/(13)` d = 308 ( subtract 14 from both sides )

`(6)/(13)` d = 294 ( multiply by 13 to clear the fraction )

6d = 3822 ( divide both sides by 6 )

d = 637 ft