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## Homework Statement

An airplane loaded with flame retardant travels horizontally at 200. km/h. The altimeter indicates that the plane is 180. m above the ground. The pilot wants to know how far in advance of the fire to release the retardant. Please assist her.

The answer was given, which is 336 meters

## Homework Equations

d=vit+1/2at^2

## The Attempt at a Solution

So I plugged in all the numbers, 180 for d, 0 for vi, -9.81 for a. I got to 180=4.905t^2, which turns to 36.69. Then, I squared it, and got about 6.8, which is nowhere close to the time I need, which is 1.68. Please help me!