Find the percent of the area under the density curve where x is more than 3.
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The percent of the area under the density curve where is more that 3 is 25 %.

Step-by-step explanation:

Since the density curve is a linear function, the area under the curve can be calculated by the geometric formula for a triangle, defined by the following expression:

(1)

Where:

- Area, in square units.

- Base of the triangle, in units.

- Height of the triangle, in units.

The percent of the area is the ratio of triangle areas under the density curve multiplied by 100 per cent, that is:

The percent of the area under the density curve where is more that 3 is 25 %.