Answer:
C. 1 solution
Step-by-step explanation:
I calculated logically
Answer:
2) 70,000
Step-by-step explanation:
since they have said estimate meaning frist round off
679 rounds up to 700 and 98 rounds up to 100
700×100
70000
Answer:
x=12
Step-by-step explanation:
f(x)=16x-30 and g(x)=14x-6
(f-g)(x)=0
f(x)=16x-30 -(14x-6)
Distribute
= 16x -30 -14x +6
Combine like terms
= 16x-14x -30+6
2x-24
Set this equal to zero
2x-24 =0
Add 24 to each side
2x-24 +24=0+24
2x=24
Divide by 2
2x/2 =24/2
x = 12
Answer:
![[km^2]](https://tex.z-dn.net/?f=%5Bkm%5E2%5D)
Step-by-step explanation:
In this problem, the initial area of the forest at time t = 0 is
![A_0 = 1500 km^2](https://tex.z-dn.net/?f=A_0%20%3D%201500%20km%5E2)
After every year, the area of the forest decreases by 9.8%: this means that the area of the forest every year is (100%-9.8%=90.2%) of the area of the previous year.
So for instance, after 1 year, the area is
![A_1 = A_0 \cdot \frac{90.2}{100}=0.902 A_0](https://tex.z-dn.net/?f=A_1%20%3D%20A_0%20%5Ccdot%20%5Cfrac%7B90.2%7D%7B100%7D%3D0.902%20A_0)
After 2 years,
![A_2=0.902 A_1 = 0.902(0.902A_0)=(0.902)^2 A_0](https://tex.z-dn.net/?f=A_2%3D0.902%20A_1%20%3D%200.902%280.902A_0%29%3D%280.902%29%5E2%20A_0)
And so on. So, after t years, the area of the forest will be
![A(t)=(0.902)^t A_0](https://tex.z-dn.net/?f=A%28t%29%3D%280.902%29%5Et%20A_0)
And by substituting the value of A0, we can find an explicit expression:
![[km^2]](https://tex.z-dn.net/?f=%5Bkm%5E2%5D)