SOLUTION: A sailor on a submarine uses a periscope to view the surface of the ocean. The periscopes height H9in feet) above the surface and the distance d(in miles) that the sailor can see

Algebra ->  Test -> SOLUTION: A sailor on a submarine uses a periscope to view the surface of the ocean. The periscopes height H9in feet) above the surface and the distance d(in miles) that the sailor can see       Log On


   



Question 689585: A sailor on a submarine uses a periscope to view the surface of the ocean. The periscopes height H9in feet) above the surface and the distance d(in miles) that the sailor can see are related by the formula h=d^2/1.4. Suppose the periscope is at a height of 3 feet. To the nearest mile, how far can the sailor see? Please show me how to do this. I don't understand it. Thank you.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A sailor on a submarine uses a periscope to view the surface of the ocean.
The periscopes height H (in feet) above the surface and the distance d(in miles) that the sailor can see are related by the formula h=d^2/1.4.
:
Suppose the periscope is at a height of 3 feet.
To the nearest mile, how far can the sailor see?
:
Replace h with 3 and find d, write the equation:
d%5E2%2F1.4 = 3
multiply both sides by 1.4
d%5E2 = 1.4(3)
d%5E2 = 4.2
d = sqrt%284.2%29
d = 2.05 miles