It’s 15 km. You need to take the root from 9^2 + 12^2 wich equals 15. You need to use pythagoras a^2 + b^= c^2
Answer:

Step-by-step explanation:




Therefore, the answer is <u>1</u><u>0</u><u>2</u><u>4</u><u>.</u>
<h3>
<em>Benjemin</em></h3>
42x^2 + 20x + 42
Hope this helps