Find part "b". =_4____
2 answers:
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For this case, we have the total of painters is 16, so to determine what percentage is painting the interior of the house, we make a rule of three:
16 ---------------> 100%
4 -----------------> x
Where "x" represents the% of painters who paint the interior of the house.
Thus, 25% of painters are painting the interior of the house.
Answer:
25%
This is the answer for graph
Answer:
<em>The initial number of annual births in 2018 is 918,397</em>
<em>The percent decrease in birth rates is 2.37%</em>
<em>The expected number of births in 2021 is 834,379</em>
Step-by-step explanation:
<u>Exponential Decay Function</u>
The exponential function is frequently used to model natural decaying processes, where the change is proportional to the actual quantity.
An exponential decaying function is expressed as:
Where:
C(t) is the actual value of the function at time t
Co is the initial value of C at t=0
r is the decaying rate, expressed in decimal
We are given the function that models the annual birth rate for a population of a given country:
Where t represents the number of years since 2018.
a.) We can identify the variables with the actual model by comparing with the general equation, thus: Co=918,397 and 1-r=0.9763.
Solving for r we have r=1-0.9763=0.0237.
This means the initial number of annual births in 2018 (t=0) is 918,397
b.) The percent decrease in birth rates is r=0.0237 = 2.37%
c.) To find the expected number of births in 2021 (t=4 years), we substitute the value of t in the equation of the model:
Calculating:
y = 834,379
The expected number of births in 2021 is 834,379