A company that produces snowboards forecasts monthly sales over the next 2 years to be S = 22.9 + 0.449t + 4.7 cos where S is measured in thousands of units and t is the time in months, with t = 1 representing January 2014. Predict sales for each of the following months. (Round your answers to the nearest whole number.) (a) January 2014 S = 28.048 thousand units (b) January 2015 S = thousand units (c) April 2014 S = thousand units (d) April 2015 S = thousand units

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Q: Question no 2.

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Q: The imaginary unit i is defined as i = __________, where i2 = ___________

A: Imaginary unit is represented by i.

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Rate of Change

The relation between two quantities which displays how much greater one quantity is than another is called ratio.

Slope

The change in the vertical distances is known as the rise and the change in the horizontal distances is known as the run. So, the rise divided by run is nothing but a slope value. It is calculated with simple algebraic equations as: