Answer: 25.2361459992ft
This question can be solved by a trigonometric equation. Shadow formed when something with height like a tree, so it can be pictured as a vertical line. Shadow is a length of and can be pictured as a horizontal line.
In trigonometric, to find the vertical line length with horizontal line you need tan function. The sun angle will be used in the function, so the calculation would be: tan(31) x 42ft = 25.2361459992ft
The answer is B. The shape is staying the exact same, it’s just moving.
Option D:
Solution:
Given compound inequality:
Let us first solve 
.
Subtract 6 from both sides.
To reverse the inequality multiply by -1 on both sides.
Now solve the next inequality 
.
Add 9 on both sides.
Divide by 2 on both sides.
Combine the inequality.
Option D is the correct answer.
