Question

The number of people contacted at each level of a phone tree can be represented by f(x) = 3x, where x represents the level.

Answer 1

x=3; At level 3, 27 people will be contacted.(apex)

Answer 2

Answer:

Option B is correct

x= 3, At level 3, 27  number of people contacted

Step-by-step explanation:

As per the given statement:

The number of people contacted at each level of a phone tree can be represented by:

$f(x) = 3^x$

where, x represents the level.

We have to find the value of x when f(x) = 27.

⇒27 = 3^x

We can write 27 as:

$27 = 3 \times 3 \times 3 = 3^3$

then;

$3^3 = 3^x$

on comparing we have;

3 = x

or

x = 3

Therefore, the value of x is, 3.