Question

The function b(n) = 6n represents the number of light bulbs b(n) that are needed for n chandeliers. How many lightbulbs are needed for 15 chandeliers?
90 lightbulbs
2 lightbulbs
96 lightbulbs
80 lightbulbs

Answer 1

The answer is 90 lightbulbs.

b(n) - the number of light bulbs
n - the number of chandeliers
The function is b(n) = 6n

If n = 15, then:
b(15) = 6 · 15 = 90
Therefore, the number if light bulbs needed for 15 chandeliers is 90.

Answer 2

Answer:

Option A is correct.

90 lightbulbs are needed for 15 chandeliers.

Step-by-step explanation:

Given: The function b(n) = 6n                  ......[1]

where n represents chandeliers and b(n) represents the number of light bulbs.

To find the number of light bulbs are needed for 15 chandeliers.

Substitute n = 15 in [1] we get;

$b(15) = 6 \cdot 15 = 90$ lightbulbs

Therefore, 90 light bulbs are needed for 15 chandeliers.