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Calculate the area between the curves and .

Use your calculator to find the points of intersection between the two graphs.
Then determine which graph is on top (has higher -values) and which is below.

Upward parabola, labeled the quantity,  x minus 3 times  x, vertex at the point (1.5, comma negative 2.25), & periodic curve, labeled sine of pi x, from x values negative 10 to 10, with 20 visible turning points, oscillating between y = negative 1 & y = 1.