The speed s (in miles per hour) of a car can be given by s = sqrt(30fd), where f is the coefficient of friction and d is the stopping distance (in feet). The coefficient of friction for a snowy road is 0.30. You are driving 20 miles per hour and approaching an intersection. How far away from the intersection must you begin to brake? Your answer

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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.