For Mother's Day, Bob made a pop-up card for his mom. He started with a large paper rectangle. Then, Bob cut out a square with an area of 81 square inches from the middle of the large rectangle. The area of the piece Bob had left was 129 square inches. Let r represent the area of the rectangle that Bob started with. Which equation models the problem?

answer: b

step-by-step explanation: im sorry bro bro but thats not a eqation the human mind can answer and plus im a devil

chemists are often responsible for designing a chemical reaction and analyzing the products obtained from it. one significant part of designing a chemical reaction is determining the amount of each reactant that is needed and the amount of each product that will be produced. in order to do so, chemists use stoichiometry, the quantitative relationships between reactants and products.

the answer to your question is minor arc.