Answer is b hope it helps
You add the exponents so it would be 4+5 which is 9 so your answer is a^9
Answer:
Step-by-step explanation:
what you need to do is look at the question again it say 10 feet above sea level and the other one is 7 feet below sea level. now read your question again hope you find the answer good luck
Umm just do the problem with 7 in the place of N