CAN SOMEONE PLEASE HELP ME WITH THIS QUESTION???
1 answer:
Answer:
The complete answer is explained below.
Step-by-step explanation:
The problem is demanding to simply determine the number of years each color light would last.
We know the following information from the question:
- As it is clear that a red light remains TURNED ON 50% of the time.
- Green remains TURNED ON 42% of the time
- Yellow remains TURNED ON 8% of the time.
Also the bulbs for each color are LED and are designed to last 100,000 hours. So, each light does last 100,000 hours.
lets make conversions
As
Dividing hours by
hours would bring
days
Dividing days by
days would bring
years, meaning 11 years and 4 months.
Keywords: light, conversion, day, hours
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Answer:
22
Step-by-step explanation:
mean is calculated as
mean =
Given the mean of 12 numbers is 20 , then
= 20 ( multiply both sides by 12 )
sum = 240
Given the mean of 8 numbers is 25 , then
= 25 ( multiply both sides by 8 )
sum = 200
Total sum of the 20 numbers = 240 + 200 = 440, then mean of 20 numbers is
mean = = 22