PLEASE HELP ME! I NEED ANSWERS FAST! WILL MARK THE BRAINLIEST!

Answer:
d
Step-by-step explanation:
The correct answer is d because Nora is proving that PS : PR = PT : PQ and we know that PT = 48 and PQ = 48 + 36 so substituting those values into the right side of the equation gives us 48 : (48 + 36).