Help for B and c please !!

If you roll two fair dice (one black die and one white die), in how many ways can you obtain a 4 on at least one die?

Find the cosine function that is represented in the graph.

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number t of tokens james has is a function of g, the number of games he plays. write the function’s formula? t=