Cindy wants to secure sequins on a piece of felt shaped like a trapezoid with a height of 10 cm. and bases of 15 cm. and 9 cm. what is the cost of all the sequins if sequins cost $0.80 per cm². of coverage?

arithmetic sequence

step-by-step explanation:

given that a sequence has terms as

19, 15, 11,

this is represented on a graph

the pattern indicates that the sequence is an arithmetic sequence with i term

a=19 and common difference d =-4

any general term

thus the sequence is reduced by 4 for each successive term starting from 1 and nth term is

24-5n.

first negative term would start after 5th term

5th term =24-25< 0

from 5th term onwards the sequence would be negative.