posted by .

One day, a controversial video is posted on the Internet that seemingly gives concrete evidence of life on other planets. Suppose that 50 people see the video the first day after it is posted and that this number doubles everyday after that.

a) write an expression to describe the number of people who have seen the video t days after it is posted.

b) one week later, a second video is posted that reveals the first as a hoax. Suppose that 20 people see this video the first day after it is posed and that this number triples every day after that. Write an expression to describe the number of people who have seen the 2nd video t days after it is posted.

c) set the two expressions from parts a and b to equal each other and then solve for t. What does this solution mean?

Ok can you just check my answers for parts a and b, except for part c i don't know what this means.

a) A(t)=50(2)^t
b) A(t)=20(3)^t
c) I set them equal to each other and the variable disappeared on cancelled out What does this mean?

  • pre-calc -

    right on a,b.

    50 2^t = 20 3^t
    take the log of each side
    log50 + t*log2 = log 20 + t log3
    solve for t

    log to any base, your calculator is your friend on this.

  • pre-calc -

    Ok but I have

    Now what?

  • pre-calc -


Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. HELP!

    HOW CAN VIDEO GAMES BE GOOD FOR YOU? Video games may improve eye-hand coordination. But if you play a lot of video games, it may cause you to type too fast -- and create errors that you don't proofread such as your subject -- HLEP.
  2. Math

    Define variables and write a system of equations for this situation. Solve using substitution. Suppose you want to join a video store. Big Video offers a special discount card that costs $9.99 for one year. With the discount card, …
  3. Social Studies

    how has the internet changed video voyerism?

    A statistics professor conducted a study on the effect of playing video games on a student’s test scores. On the first day of class, she randomly divided her classes into groups. Group one played video games 2 hours a day, group …
  5. math

    Look at the revenue for videos rented (v) on a given day at two different video rental stores below r = 2v + 10 r = 1.6v + 18 After how many video rentals will the revenues of both stores be equal?
  6. Algebra 2

    Every day, there are 5 times more likes on an internet video of a dog which is modeled by the function c(n) = (5)n − 1, where n is the number of days since the video posted. On the first day, there were 103 likes. What is the …
  7. Algebra

    Write a system of equations to match each of these problems. Then solve the equations using the method... Substitution, or linear combinations. 1. Maria started her savings account with $105. She adds $10 to it each month, including …
  8. Algebra 1 thx

    Antonia is saving for a video game. On the first day, she saves two dollars in her piggy bank. Each day after that, she doubles the number of dollars she saved on the previous day. How many dollars does she save on the sixth day?
  9. Math

    If it costs $75 to buy 3 video games, how much money will Jordan need if he wants to buy 12 video games?
  10. math

    In one day, Factory A produces 1650 video games, while Factory b produces 123 Fewer video games than Factory a a) How amny video games does Factory B produce in one day?

More Similar Questions