tigerlileyy
tigerlileyy tigerlileyy
  • 04-06-2019
  • Mathematics
contestada

can someone help me with this

can someone help me with this class=

Respuesta :

ponton
ponton ponton
  • 04-06-2019

Answer:

19 m

Step-by-step explanation:

This is Geometric progression with

[tex]\left \{ {{u_1=1,\: u_2 =2} \atop {u_n=2^{n-1}u_1} \right.[/tex]

Then the fomular of sum is

[tex]S=u_1\frac{2^n-1}{2-1} =1\times(2^n-1)=2^n-1\\To\: save\: 1 \:million\: then \; our \:sum \: will \: be\: 1000000\\Hence,\\2^n-1=1000000\\2^n=1000001\\n=log_{2}{1000001}\approx19,9\\Thus, it\:would \;be \:19 \:months \:before\: we\: saved \:1000000 \:pounds[/tex]

Answer Link

Otras preguntas

how do the boys feel about the idea of santi visiting medellin
If two sides of a triangle measure 2 and 4, what might the third side be?
9 in 7 in Surface Area = 12 in 11 in 19 in
Wearing Do you agree write an School ? unitorm essay. is very important​
WILL GIVE BRAINLIEST IF FAST!! GIVE GOOD REVIEWS FOR CORRECT ANSWERS!
True or False: Coastal Tribes such as the Makah, hunted sea mammals. * 1 point True False Which statement best describes how Native Americans provided food for
The point u(4,-1) is reflected over the x axis
how can stress caused by peer pressure negatively impact someone life quality
What is the weight of an empty bottle?
4. 4A. Which net can be folded to make a cube? Select all that apply. D. A. B. 48. The surface area of the cube is 24 square feet. What is the length, in feet,