First, we need to find the scale factor used in Magnolia's scale drawing. The original flag's base length is 25 inches and the scaled down base length in the drawing is 10 inches.

Scale factor = 10 / 25
Scale factor = 0.4

Next, we need to find the scaled down height of the flag in the drawing.

Height in drawing = Scale factor * Actual height
Height in drawing = 0.4 * 15
Height in drawing = 6 inches

Now, we can calculate the area of the scale drawing.

Area of scale drawing = 1/2 * base * height
Area of scale drawing = 1/2 * 10 * 6
Area of scale drawing = 30 square inches

Therefore, the area of Magnolia's scale drawing of the flag is 30 square inches.

make it shorter

To find the scale factor, divide the scaled down base length of 10 inches by the original base length of 25 inches to get a scale factor of 0.4.

Multiply the scale factor by the actual height of 15 inches to find the height in the drawing, which is 6 inches.

Then, calculate the area of the scale drawing by using the formula for the area of a triangle: 1/2 * base * height. Plug in the scaled down base length of 10 inches and the height of 6 inches to get an area of 30 square inches.

Therefore, the area of Magnolia's scale drawing of the flag is 30 square inches.