I need to know which question it is though
Answer:
Step-by-step explanation:
we are given equation as
Firstly, we will move all terms on left side
Subtract both sides by 20
Add both sides by 7x
now, we can compare it with quadratic equation
and we get
This is an exponential decay function, or it can also be viewed as a geometric sequence, either way, it can be expressed in this circumstance as:
f=ir^t, f=final amount, i=initial amount, r=common ratio or rate, t=times ratio is applied or time.
In this case i=2000 and r=(100-7)/100=0.93 so
f=2000(0.93^t)
We are asked to find when f=600 so:
600=2000(0.93^t) divide both sides by 2000
0.3=0.93^t, take the natural log of both sides
ln0.3=t*ln0.93 divide both sides by ln0.93
(ln0.3)/(ln0.93)=t
t≈16.59
So in about 16.5 years she will own only 600 square miles. (round as appropriate for your answer)
The vertex is (26,14)
Because it’s written in vertex form which y=a(x-h)^2 + k. H is the x for the vertex And h is changed to it’s opposite. So since 26 is negative it would actually be positive 26. While k ls the y of the vertex which is 14 in our case
