Mr. mosey wants to bake a cake for the teachers in his school. he found a recipe that calls for 3/4 cups of cocoa to make an 8 serving cake. however, he needs to make a cake that serves 4 times as many people. he also wants to add a little extra cocoa to make the cake taste better so he wants to add another 3/8 of a cup of cocoa. write a number sentence to him determine the amount of cocoa he needs and then solve to find the amount of cocoa needed.