Being that the system is quadratic—with parabola opening downwards—you’re going to need to find the vertex. You can find the x coordinate of the vertex with -b/2a . Then plug in for x to find the y coordinate…
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The answer is A. $5,783
Explanation:
= $4,500.00(1 + [0.019 * 15])
= $4,500.00(1 + 0.285)
= $4,500.00(1.285)
= $5,782.50
Round $5,782.50 to the nearest whole dollar and you get $5,783
