A surveyor is walking at the rate of 4 ft/sec along the diameter of a circular courtyard. A light at one end of a diameter perpendicular to her path casts a shadow on the circular wall. How fast is the shadow moving along the wall when her distance to the center of the courtyard is r/2? a. 6.4 ft/sec b. 9.6 ft/sec c. 6.2 ft/sec d 69 ft/sec

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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.