Ok Sofia, so to solve this problem you need to know how to put things to the power and stuff. So 4 to the third is basically 4 times 4 times 4 and then you get 64. 4 times 3 is 12, 3 to the fourth is 81 and 8 squared is 64. Now for part, A only Robert and Melanie should be circled based on the math we just did. Now Miki joins in and also sells 64 muffins, the same as Robert and Melanie. Now one answer you can put for part B could be -8 because that squared is 64. Any other answer really can't be accepted here because it has to equal 64 and be to the second power and only 8 and -8 do that. Hope this helped!