The equation for an ellipse with a horizontal major axis is x²/a² +y²/b² =1 . the orbit for mercury can be plotted on the coordinate plane with the center at the origin and the sun located at one focus. use this information and the mercury’s calculated mean distance from the sun to find the value of a. express your answer in millions of miles

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.