Question

HELP PLEASE I’m dying

Answer 1

The answer is attached

Answer 2

The formula you use is a^2 + b^2 = c^2

Let's set up the equation 30^2 + 42^2 = c^2

a and b are ALWAYS the legs of the triangle. c is ALWAYS the hypotenuse. 
Since you're finding c, the shadow's length, then we leave that as c instead of plugging in a number.

Next, find the square of 30 and 42, to leave the equation: 
900 + 1,764 = x^2
add 900 + 1,764 to make 2,664.

2,664 = x^2 is what we're left with.

All you need to do now is square root 2,664 to find x instead of x^2

x = 51.614

Your answer is the last one, 51.6 feet.