Question 530427
Start with the formula for the area of a triangle:
{{{A = (1/2)b*h}}} you want this to be less than 40 sq.ft.
{{{(1/2)bh < 40}}} Substitute b = 10 (the base is 10 ft.)
{{{(1/2)*10*h < 40}}} Simplify.
{{{5*h < 40}}} Divide by 5.
{{{h < 8}}}ft.
The maximum height is 7.9...ft.