C. 15a^5b^15
Step-by-step explanation:
(3a^2b^7)(5a^3b^8)= 3*5*a^(2+3)*b^(7+8)= 15a^5b^15
Additional information:
Product Rule:
incomplete question. how do you expect anyone to you when you do not post the question in its entirety?
b) well because you get well