Modern medical advances might mean people could live 200 years. In 2009 the life expectancy is about 80 years. Assume that due t
1 answer:
Answer:
Answer: In year 2107 life expectancy will be 130 years
Step-by-step explanation:
First we understand which are the things given in the question.
In every decade life expectancy gains over 5.1 years.
Current life expectancy is about 80 years.
We have to calculate in how many decades life expectancy will increase from 80 years to 130 years which means increase of 50 years.
So from unitary method we can do the calculations.
∵ 5.1 years of life expectancy increases = in one decade
∴ 1 year of life expectancy will increase in = decades
∴ 50 years of life expectancy will increase in =×50 decades
= decades
or 9.8×10 years = 98 years
Therefore 130 years life expectancy will be in in year 2009+98 years =2107
You might be interested in
In the future, please post the full problem with all included instructions. After doing a quick internet search, I found your problem listed somewhere else. It mentions two parts (a) and (b)
Part (a) asked for the equation of the line in y = mx+b form
That would be y = -2x+9
This is because each time y goes down by 2, x goes up by 1. We have slope = rise/run = -2/1 = -2. This indicates that the height of the candle decreases by 2 inches per hour. The slope represents the rate of change.
The initial height of the candle is the y intercept b value. So we have m = -2 and b = 9 lead us from y = mx+b to y = -2x+9
----------------------------------------------------------------
Part (b) then asks you to graph the equation. Because this is a linear equation, it produces a straight line. We only need 2 points at minimum to graph any line. Let's plot (0,9) and (1,7) on the same xy grid. These two points are the first two rows of the table. Plot those two points and draw a straight line through them. The graph is below
