miarenee17ou4v5m miarenee17ou4v5m
  • 04-08-2017
  • Mathematics
contestada

If the second term in a geometric sequence is 20 and the fourth term is 11.25, what is the common ratio

Respuesta :

balindawmcdotlzzo
balindawmcdotlzzo balindawmcdotlzzo
  • 04-08-2017
So between the second and fourth term, you are multiplying by r².
20 * r² = 45/4
r² = 45/80
r² = 9/16
r = √(9/16)
r = ± (3/4)

So there are two possible common ratios:
r = -3/4
or
r = 3/4
Answer Link

Otras preguntas

give answer as a mixed number 3/5 + 4/5 =
what is an object that helps explain ideas about the natural world
Can you help me rounding this number 5.052493438 ft
What is the answer for N+4=6
Complete the pattern what is the reasoning 6,500,000 and 65,000 and 6,500 and 6.5 and 0.65
To paraphrase a poem means to A. analyze the meter. B. summarize its theme. C. rewrite it in one's own words. D. determine the rhyme scheme.
Compared to "In Trying times," the diction of "Girls Can We Educate We Dads?" is more a. emotional b. abstract c. dejected d. informal
Solve for X 4X-(9-3X)=8X-1
what geographic feature has been most responsible for extensive trade throughout Europe
Prehistoric Indian civilizations created them • made of dirt by hundreds of workers • used for different purposes, like burying the dead or building sites for i