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Rasek [7]
3 years ago
11

A countrys population in 1992 was 222 million. In 2001 it was 224 Million. Estimate the population growth in 2004 using the expo

nential growth formula. Round your answer to the nearest million.
Mathematics
1 answer:
sergejj [24]3 years ago
6 0
Find the rate of growth
224=222(1+r)^(2001-1992)
Solve for r
R=0.000997 without %
P=224(1.000997)^(2004-2001)
P=224×(1.000997)^(3)
P=224.67 million
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<h2>Hello!</h2>

The answers is:

The first mechanic's rate is $70 per hour.

The second mechanic's rate is $110 per hour.

<h2>Why?</h2>

Let's write the given information in order to make the equations that will help us to solve this problem.

Let be "x" the first mechanic's rate and "y" the second mechanic's rate, so:

If the first mechanic worked for 5 hours and the second mechanic worked for 15 hours, and the together charged a total of $2000.

5x+15y=2000

Also, we know that the sum of the two rates was $170 per hour, so:

x+y=180

Then, isolating "x" and replacing it into the first equation, we have:

x=180-y

5(180-y)+15y=2000

900-5y+15y=2000

10y=2000-900

10y=1100

y=\frac{1100}{10}=110

So, the second mechanic's rate is $110 per hour.

Now, to calculate the first mechanic's rate we need to replace "y" into the second equation:

x+y=180\\x+110=180\\x=180-110=70

So, the first mechanic's rate is $70 per hour.

Have a nice day!

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