Students in a zoology class took a final exam. They took equivalent forms of the exam at monthly intervals thereafter. After t months, the average score S(t), as a percentage, was found to be given by the following equation, where t20. Complete parts (a) through (e) below. s()= 79 - 17 In (t + 1), 0 sts 80 a) What was the average score when they initially took the test? The average score was %. (Round to one decimal place as needed.)

Thank you, please answer (b)

Hey sorry it must have cut off but what would letter A be ?

A student needs to answer 20 out of 30 questions on a test. Find the number of ways the student can choose if the student must answer the first 8 questions on the test.