S1ari5ballinGwy S1ari5ballinGwy

21-12-2016
Mathematics

contestada

The second term in a geometric sequence is 20. The fourth term in the same sequence is 45/4, or 11.25. What is the common ratio in this sequence?

Respuesta :

MissPhiladelphia MissPhiladelphia

22-12-2016

We use equations for geometric sequence. We do as follows:

a(n) = a(1) r^(n-1)
20 = ar^(2-1)
20 = ar
a = 20/r

11.25= ar^(4-1)
11.25 = ar^3
11.25 = (20/r)r^3
r = 0.75

Hope this answers the question. Have a nice day.

Answer Link

victoriachadwick1250 victoriachadwick1250

18-06-2019

Answer:

0.75

Step-by-step explanation:

Answer Link

Otras preguntas

What did leaders of the public school movement work to establish? a. tax supported schools. b. low tuition colleges. c. free text books d. better private sc

I need help Please help! which of the following assessment types has the greatest effect on your overall grade? a. discussion b. quiz c. quick check d. test

Due to human demand because of its importance to life, the Earth's most precious resource is a. soil.B. saltwater.C. freshwater.D. oil.

Which part of the Constitution establishes the legislative branch of the government? a. Amendment I b. The Bill of Rights c. Article II d. Article I'

A material that can be hit without shattering is? viscous, flammable, hard, malleable

What is 4 13/25 mixed number as decimal,

What is the primary purpose of the Tenth Amendment in the Bill of Rights? A: to establish the right to a fair trail B: to establish the powers of the states C:

Annelids have a(an) ____ circulatory system, in which blood is contained in a network of blood vessels. a. open b. dorsal c. closed d. ventral

Plate tectonics may affect organic evolution because movement of plates may cause a change in ____. a. natural selection c. Pangaea b. the environment d. th

Five times the sum of a number and two is thirty-five. Find the number.