It would be 25 ft because the person is 5 feet tall but the shadows only 4 ft :)
Your system could be anything, just remember that input should be half than the output.
So, y ≥ 1/2x
5y ≥ 5/2x
10y ≥ 5x
Hope this helps!
What happened in the first questions doesn't influence the final question, so the probability is simply 1/5 = 0.2
Answer:
13b + 6= 18b
Step-by-step explanation: