Question 689585
 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^2/1.4}}} = 3
multiply both sides by 1.4
{{{d^2}}} = 1.4(3)
{{{d^2}}} = 4.2
d = {{{sqrt(4.2)}}}
d = 2.05 miles