maths

posted by .

In the year 2000 there were 350 mobile phones users living in the small town of Phoneville. Since 2000 the number of residents using mobile phones has increased by 25% each year, that is, each year the number of mobile phones increases by a factor of 1.25
Calculate, to three significant figures, the number of mobile phone users after 19 years. You may find it useful to first devise a formula for the number of mobile phone users after n years.

  • maths -

    number of mobile phones
    = 350(1.25)^19 = 24 286.13

    I thought Phoneville was a small town?

  • maths -

    Thanks! I've no idea, i thought my answr was too far off but I was using the wrong formula. Thanks!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    The number of people in the United states with mobile cellular phones was about 142 million in 2002 and about 255 million in 2007. if the growth in mobile cellular phones was linear, what was the approximate rate of growth per year …
  2. statistics

    Webcredible, a UK-based consulting firm specializ- ing in websites, intranets, mobile devices, and applications, conducted a survey of 1,132 mobile phone users between February and April 2009. The survey found that 52% of mo- bile …
  3. Stats PLEASE HELP!!!

    Webcredible, a UK-based consulting firm specializ- ing in websites, intranets, mobile devices, and applications, conducted a survey of 1,132 mobile phone users between February and April 2009. The survey found that 52% of mo- bile …
  4. Algebra

    The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write …
  5. Algebra

    The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write …
  6. Algebra

    The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write …
  7. Algebra

    The cost of producing cell phones is represented as C=mx+b, where m is the marginal cost, x is the number of phones produced, b is the fixed cost, and C is the final cost. a. If the fixed cost is $75 and the marginal cost is $8, write …
  8. statistics

    A customer service division of a telecommunications firm receives 100 mobile phones for repair on a particular week. 18 of the phones are less than a year, 60 phones are more than a year but less than 2 years and the rest are older …
  9. Math

    The population of a town is modelled by P=-0.1x^2+1.2x+4.4 where x is the number of years since the year 2000, and y is the population in thousands. a) In the year 2005, what is the population?
  10. Math

    We all need help on this. The population of a town is modelled by P=-0.1x^2+1.2x+4.4 where x is the number of years since the year 2000, and y is the population in thousands.  a) In the year 2005, what is the population?

More Similar Questions