Answer:
B
Step-by-step explanation:
You multiply the exponents to get rid of the parenthesis. you will get 3 to the power of -30, over 7 to the power of -15. Now, you want to get rid of the negative exponents, so you flip them. 7 to the -15 power becomes 7 to the 15 power, goes on the numerator, and 3 to the -30 power becomes 3 to the 30 power and goes on the denominator. Therefore you get 7 to the 15 power over 3 to the 30 power. The answer is B
