Below are five number sequences. which ones are geometric sequences? check all that apply.a- 1 2 3 4 53 9 27 81 343b. 2, 3, 5, 9, 17,c. 3, -12, 48, -192, 768,d. 3, -15, -33, -51, -69,e., 1 1 1 1

Geometric sequence is a sequence of values where the next term is the product of the previous term multiplied by a fixed amount called common ratio.

Among the choices, I find 2 that are geometric sequences.

C. 3, -12, 48, -192, 768  common ratio is -4

E. 1, 1/2, 1/4, 1/8,1/16 common ratio is 1/2

15.9/100 pregnant women = x/25,250 pregnant women. 
15.9 times 25,250 = 401475 divided by 100 = 4014.75 
Answer = 4015 would be expected to deliver by C-section.