Divide the shape into 2 different rectangles:
25 x 11 = 275
42 x 14 = 588
Total area = 275 + 588 = 863 square yards.
The simplified expression of
is 
The expression is given as:

Expand the expression

Factor out 2

Combine the radicals

Expand the expression

Evaluate the roots

Expand

Hence, the simplified expression of
is 
Read more about simplified expressions at:
brainly.com/question/8008182
Answer: 15 feet
Step-by-step explanation:
Hi, since the situation forms a right triangle (see attachment) we have to apply the next trigonometric function.
Tan α = opposite side / adjacent side
Where α is the angle of elevation to the sun, , the opposite side (x) is the height of the tree, and the adjacent side is the length of the shadow.
Replacing with the values given:
Tan 31 = x /25
Tan 31 (25) =x
x = 15 feet
Feel free to ask for more if needed or if you did not understand something.
X=1/2
Could be your answer