Answer:
- Decay rate, r = 0.014
- Initial Amount =120,000
- P(10)=104,220
Step-by-step explanation:
The exponential function for growth/decay is given as:
In this problem:
The city's initial population is 120,000 and it decreases by 1.4% per year.
- Since the population decreases, it is a Decay Problem.
- Decay rate, r=1.4% =0.014
- Initial Amount =120,000
Therefore, the function is:
When t=10 years
Answer:
2x+4
Step-by-step explanation:
Given that a is the average (arithmetic mean) of 4x and 7, b is the average of 5x and 6, and c is the average of 3x and 11
By definition of arithmetic mean,
we have 
Let us calculate sum of a,b,c in terms of x
a+b+c = 
Average = sum/3 = 
Answer:
20 and 90
Step-by-step explanation:
Answer:
0.2 hours
Step-by-step explanation:
The depth, d of snow (in cm) that accumulates in Harper's yard during the first h hours of a snowstorm can be calculated using the equation:
d=5h
When d=1cm, we want to determine the value of h.
1=5h
h=1/5=0.2
Therefore, it takes 0.2 hours for 1 centimeter of snow to accumulate in Harper's yard.
Answer:
2;4;3
Step-by-step explanation:
y=2x²+4x+3
