idioticeinstein9021
20.09.2020 •
Mathematics
A student looking at global population figures remarks that between the years 1950 and 2010 the global population can be modelled by the equation 300y= 23t−44 180 (1950≤t≤2010),
Write down the gradient of the straight line represented by the equation 300y= 23t−44 180 (1950≤t≤2010)
What does this represent in the practical situation being modelled?
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Ответ:
The equation is (i guess):
300*y = 23*t -41,180
This is a linear equation, where y represents the population, and t represents time (in years)
Now, to find the gradient, we must derive the function y with respect to the time.
then we can write:
y = (23/300)*t - (41,180)/300.
now, remember that when we have:
y = a*x^n
we also have:
dy/dx = n*a*x^(n-1)
then in this case, we have:
dy/dt = (23/300) + 0
now we pass aain the 300 to the right:
300*dy/dt = 23.
d(300*y)/dt = 23
what does this mean?
Thie mean that for each unit of that t increases, we have an increase of 23 units in 300*y.
Ответ:
The formula for simple interest is:
I = Prt, where I= the amount of interest accumulated, P = the principal (the initial amount invested), r = the interest rate, and t = the amount of time the money accrues interest
In our problem, P = 300, A= 6% = .06, and t = 6 (years)
So our equation becomes:
I = 300(.04)(6)
Once you perform the above calculation, Darrick, add this amount to the initial deposit of $300 to obtain the balance of the account after 6 years.
Step-by-step explanation: