Can someone help me with this please

I think no. b is the right answer

C

Step-by-step explanation:

9 = 3^2

3^7 : 3^2 = 3^(7-2) = 3^5

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

b, i believe, but not sure.