1998jzavjzav 1998jzavjzav

25-07-2017
Mathematics

contestada

What is the sum of the first five terms of a geometric series with a1=20 and r=1/4

Respuesta :

25-07-2017

The sum of a geometric sequence is:

s(n)=a(1-r^n)/(1-r), a=initial term and r=common ration so

s(n)=20(1-0.25^n)/(1-0.25)

s(5)=20(1-0.25^5)/(0.75)

s(5)=26.640625

Answer Link

haleyfordice75 haleyfordice75

10-04-2019

Answer: 26.640625

Step-by-step explanation:

Answer Link

Otras preguntas

USE THE CLUES TO CRACK THE CODE The digits of the code are 4,4, 0, and 2. The number is less than 1. The value of the thousandths digit is value of the hundred

A bottle contains 75 mL of ethyl chloride. The density of ethyl chloride is 0.765 g/mL, what is the mass of ethyl chloride in the bottle?

The functions r and s are defined as follows. r(x)= -2x-2 s(x)=2x² +2 Find the value of s (r (2)).

- 4x + 11y = 15 X = 2y Y = X =

Write a sentence for the equation. 2(t+4q)=2q+4t

Describe MLK in relation to the CRC and after the MBB. How did he change in comparison to the MOW and from leaving the NAACP to the leader of MIA?

What is the correct answer please help

solve pls brainliest

PLEASE HELP IT’S DUR TMR

What does costal cartilage connect?