Answer:
Number 3 would be considered a constant.
Step-by-step explanation:
7h and an h at the end, so it isn't a constant number.
Answer:
15. C. segment AC
16. D. angles ACD and DCE
17. C. substitution
18. C. axiomatic systems
19. A. Axioms
20. D. Defined Terms
Suppose the original price to be x.
62%x=296.4
Divide both sides by 62% to get x=478, which is the original price.
You're starting at 400. Each time you're cutting in half.
So the common ratio is 1/2 which means the equation is

which is in the geometric sequence format. So the answer is choice D