b is the answer that makes most sense
step-by-step explanation:
1^3 + 2^3 + 3^3 +4^3 = (1+2+3+4)^2
i am only able to answer the first part. i am not sure about the second part. sorry
85.3-64 = 21.3
so laura has already added 85.3 grams of chocolate powder and she has gone over the amount specified in the recipe by 21.3 grams
hope i ! have a great day!