Take however many boys/girls there are and divide it by how many sports there are... so 250/3= 83 boys per sport and 80 girls per sport.
Since sale is 40% so the price is 60%
61*(60%) = 36.6
the tax is 5%
so the price after tax is: 36.6 * (1 +5%) = $38.43
$495.28 I think I'm not sure if I'm right.
Put a dot on the -3 from the y-axis and draw a straight line from left to right.
The ratio of the surface area to the volume will decrease