Tbh I would say ounces or grams. I wouldn't make a final decision on my answer though.
._.
Answer:
the temperature rose by 34*F
Step-by-step explanation:
-13*F + 34 = 21*F
The rmander would be 3 i think
Imma just solve for f⁻¹(x) for this one
to solve fr the invers
replace f(x) with y
switch x and y
solve for y
replace y with f⁻¹(x)
I'm assuming your thing is
![f(x)=log_2(x+4)](https://tex.z-dn.net/?f=f%28x%29%3Dlog_2%28x%2B4%29)
remember
![log_a(b)=c](https://tex.z-dn.net/?f=log_a%28b%29%3Dc)
translates to
![a^c=b](https://tex.z-dn.net/?f=a%5Ec%3Db)
so
if we replace y with f(x)
![y=log_2(x+4)](https://tex.z-dn.net/?f=y%3Dlog_2%28x%2B4%29)
switch
![x=log_2(y+4)](https://tex.z-dn.net/?f=x%3Dlog_2%28y%2B4%29)
translate
![2^x=y+4](https://tex.z-dn.net/?f=2%5Ex%3Dy%2B4)
minus 4
![2^x-4=y](https://tex.z-dn.net/?f=2%5Ex-4%3Dy)
![f^{-1}(x)=2^x-4](https://tex.z-dn.net/?f=f%5E%7B-1%7D%28x%29%3D2%5Ex-4)
evaluate
![f^{-1}(3)=2^3-4](https://tex.z-dn.net/?f=f%5E%7B-1%7D%283%29%3D2%5E3-4)
![f^{-1}(3)=8-4](https://tex.z-dn.net/?f=f%5E%7B-1%7D%283%29%3D8-4)
![[f^{-1}(3)=4](https://tex.z-dn.net/?f=%5Bf%5E%7B-1%7D%283%29%3D4)
it equals 4