Respuesta :

DeanR

Let r be the common ratio, then the first four terms are

[tex]5, 5r, 5r^2, 5r^3[/tex]

[tex]5r^2 = 80[/tex]

[tex]r^2 = 16[/tex]

[tex]r = 4[/tex]

Fourth term [tex]5r^3 = 320[/tex]

Answer: 320


zaria68
Mm do u have the answer yet?