theleffbrain theleffbrain
  • 25-06-2021
  • Mathematics
contestada

Someone help fast please

Someone help fast please class=

Respuesta :

willwlly willwlly
  • 25-06-2021

Answer:

C

Step-by-step explanation:

Answer Link
jimrgrant1 jimrgrant1
  • 25-06-2021

Answer:

A

Step-by-step explanation:

The sequence of payment is geometric , that is

1, 3, 9, ...

The sum to n terms of a geometric sequence is

[tex]S_{n}[/tex] = [tex]\frac{a(r^{n}-1) }{r-1}[/tex]

where a is the first term and r the common ratio

Here a = 1 and r = 3 ÷ 1 = 3 , then

[tex]S_{15}[/tex] = [tex]\frac{1(3^{15}-1) }{3-1}[/tex] = [tex]\frac{14348907-1}{2}[/tex] = [tex]\frac{14348906}{2}[/tex] = 7174453 cents and

7174453 ÷ 100 = $71,744.53 → A

Answer Link

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