A flare is launched from a life raft with an initial upward velocity of 192 m/s. a) How many seconds will it take for the flare to return to the sea? Use the formula h = 192t – 161*, where h is the height in metres and t is the %3D time in seconds. b) If a passing boat can only see a flare that is at least 100 m above the life raft, for how long will the flare be visible, rounded to the nearest second?

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.