Arecipe calls for 4 sliced apples. you cut the apples into thirds. how many pieces of apple do you have? a) 3 pieces b) 6 pieces c) 12 pieces d) 15 pieces

In triangle abc, the length of side ab is 12 cm, the length of side bc is 5 cm, and the length of side ca is 9 cm. find the measure of angle a using the law of cosines.

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?

Could someone with number 1 and 2