Mr. Jones replace 40% of the lights on a Christmas tree. If he replaced 30 lights, how many lights are on the tree total?
2 answers:
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Answer:
a) 1.479 Million
b) 36.9%
c) 13.668%
Step-by-step explanation:
The complete question is attached in the image below.
The number of internet users in Mexico between 2004 and 2008 is modelled by the following equation:
Where, u(t) is in millions and t is the number of years since 2004.
Part a) Rate of change of internet users between 2004 and 2006
The rate of change of a function is defined as:
We have to find the rate of change between 2004 and 2006. For 2004 t = 0, and for 2006, t = 2. So the rate of change for the given function will be:
Thus, the average rate of change in number of internet users in Mexico from between 2004 and 2006 was 1.479 million.
Part b) Percentage change of internet users between 2004 and 2006
The formula to calculate the percentage change is:
Here, New value means the users in 2006 and original value means the users in 2004.
Using the values in this formula, we get:
Thus, the percentage change in the number of internet users between 2004 and 2006 was 36.89%
Part c) Percentage of internet users in 2008
For 2008, t would be equal to 4.
So, the number of internet users in Mexico in 2008 would be = million = 15,028,575 (rounded to nearest integer)
Total population of Mexico in 2008 = 109,955,400
We have to calculate what percentage of Mexico population was Internet users in 2008. The formula for this would be:
Here, concerned value is the number of internet users and total value is the total population. Using the values in this formula we get:
Thus, 13.668% of the population was internet users in 2008 in Mexico.
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