ok well i forget how to find the area of a trapezoid but you can solve it by breaking it down into a rectangle and two triangles
so for the rectangle multiply 7 by 4 to get 28
for the triangle you have to subtract 7 from ten to get 3 this is the length of the base. then you multiply 4 by 3 by 0.5 to get 6
now you have two triangles so multiply 6 by 2 to get 12
now add it all up to get 28+12=40
ummmmmmmmmmmmmmmm so this isn't an answer choice
i looked up the trapezoid formula and it is [tex]A=\frac{a+b}{2} h[/tex]
so if you fill in the blanks A=((7+10)/2)4
so A=(17/2)4
A=8.5*4
A=34
so the actual answer is 34 feet
but i see how you got 40
