Please help me #5 and 6 .... thank you
2 answers:
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Answer:
Step-by-step explanation:
To find the cost of the entire fence, we need to first determine the lawn's length before calculating its perimeter.
Area of rectangular lawn = (formula for the area of a rectangle)
feet
Now that we have the lawn's length and width, we can calculate the perimeter:
Perimeter (formula for the perimeter of a rectangle)
feet
Since each foot of lawn costs $2, then the cost of the entire fence will be:
∴ The entire fence costs .
Hope this helps :)
Answer:
a. y = 4,200
b. 9.2%
Step-by-step explanation:
Given the information:
- The intinital value: 4,200
- The population is decreasing at a rate of 2.4% per year
=> the base number of the exponential function is:
100% - 2.4% = 97.6% = 0.976
Let t is quarter
Let y is the population
=> the following shows an exponential decay function to find the quarterly decay rate is:
y (t)= 4,200
b. The population is decreasing by how much percent per quarter?
Let t = 0 we have: y(0) = 4,200
Let t = 1 we have: y(1) = 4,200
=> the decreasing percentage is:
= (y(0) - y(1)) / y(0)*100%
= (4200 - 3811) / 4200 *100%
= 389/4200*100%
= 9.2%