9. Which function could be used to represent the sequence 8, 20, 50, 125, 312.5,..., given that a , = 8? (F- IF.A.1, F-IF.A.2, F-IF.A.3) (1 point O A. a = an - 1+a1 B. an = 2.5(an - 1) O C. an = a1 + 1.5(an - 1) O D. an= (a1)(an -1)Text-to-Speech 10. A recursively defined sequence is shown. (F-IF.A.1, F-IF.A.2, F-IF.A.3) (1 point) a1 =5 an+1= 2an -7 The value of a , is O A. -9 O B. -1 O C. 8 O D. 15* # Text-to-Speech 1. A scientist began study with a sample of 1,500 bacteria. He noticed that the number of bacteria in the sample after t days can be modeled by the equation P = 1,500.5'. In this equation, what does 5' represent? (A.SSE.A.1) (1 point) O A. The number of bacteria increases by 5 bacteria each day. O B. The number of bacteria increases by t bacteria after 5 days. C. The number of bacteria increases by a factor of 5 each day. O D. The number of bacteria increases by a factor of t each day for 5 days