Please help with question 3 please math

So because of the way 30-60-90 triangles work, the side opposite to the 30 degrees is half of the side opposite to the 90 degrees. (If u finish the triangle, you’ll see the 30 degrees). So because of this fact, u know that the side opposite to the 90 degrees will be twice as much as 7 yards. This means her height will be 42 feet, which is higher than the tree.

You can also do
sin30 = 21/x
1/2 = 21/x
x = 42
42>40

A5 miles because when you look at the chart count how many times it goes into it i don’t even know wha,t i’m saying anymore mpbut long stor6 short it’s 5 miles

Distance=slopeslope is -2/4which equals-1/2the distance between these two points is -1/2