Answer:
21 in
Step-by-step explanation:
by the Pythagorean theorem we have

notice that the 841 and the 400 don't go squared because they already squared!
This good question needs a good answer which is......854.96
15.6/-3 = - 5.2 is the answer
Can you please attach an image so i can answer? Let me know when you do that and i’ll be glad to help!