anonymous 4 years ago 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

1. anonymous

n represents the amount of chandeliers you have. b(n)=6n represents how many lightbulbs are needed with respect to the amount of chandeliers you have

2. anonymous

\[b(n)=6n\] \[b(15)=6(15)\] \[b(15)= 90\]

3. anonymous

Okay! Thank you, so much! And I have another question, if you wouldntr mind helping?? Bamboo plants grow rapidly. A bamboo plant is 130 inches tall. Tomorrow it will be 143 inches tall, the next day it will be 156 inches tall, and on the next day it will be 169 inches tall. Write a rule to represent the height of the bamboo plant as an arithmetic sequence. How tall will the plant be in 13 days?

4. anonymous

Ok, so whats the formula for arithmetic sequences?

5. anonymous

For this probem +13?

6. anonymous

No, not for this problem. I mean you need to find the formula that sequences this problem.

7. anonymous

13 is the common difference.

8. anonymous

\[a_{n} =a_{1}+(n-1)d\]

9. anonymous

familiar?

10. anonymous

ohhh, yeah, I got ya. Now what?

11. anonymous

You said 13 is the difference, so what variable does that represent?

12. anonymous

a?

13. anonymous

No, d

14. anonymous

Ohh..

15. anonymous

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16. anonymous

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