Question

In a singing competition, there are
150 participants. At the end of each
round, 40% of the participants are
eliminated. How many participants
are left after n rounds?

Answer 1

Answer:

150(.40)^n is your equation

Step-by-step explanation:

Answer 2

Answer:

$=150\cdot{0.4^n}$

Step-by-step explanation:

Let n be the number of rounds. Lets look at n=1 which is round one. Therefore if 40% of the contestants are eliminated then we can write an expression of the number of contestants eliminated:

$=150\cdot{0.4}$

For round two, n=2:

$=150\cdot{0.4)\cdot{0.4}=150\cdot{0.4^2}$

Therefore for the n number of rounds:

$=150\cdot{0.4^n}$