B=75, not 27
Sorry, I had to use a napkin because I was too lazy to get a paper....let me know if u need me to explain anything
Do NOT search the link they WILL hack you
Hi!
You didn't list the options, but I think I know the answer. Let me know if my answer isn't listed! :)
We need to multiply the exponents.3 · -5 = -15
The answer is ![2^{-15}](https://tex.z-dn.net/?f=%202%5E%7B-15%7D%20)
Hope this helps! :)
Let's call the store value as s and the wholesale price as w. A store prices tapes by raising the wholesale price 50%(0.5 in decimals) and adding 25 cents, writing this as an equation, we have
![s(w)=w+0.5w+0.25](https://tex.z-dn.net/?f=s%28w%29%3Dw%2B0.5w%2B0.25)
If we invert the equation we're going to find the the wholesale price as a function of the store price.
![\begin{gathered} s=w+0.5w+0.25 \\ s=1.5w+0.25 \\ s-0.25=1.5w \\ w(s)=\frac{s-0.25}{1.5} \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20s%3Dw%2B0.5w%2B0.25%20%5C%5C%20s%3D1.5w%2B0.25%20%5C%5C%20s-0.25%3D1.5w%20%5C%5C%20w%28s%29%3D%5Cfrac%7Bs-0.25%7D%7B1.5%7D%20%5Cend%7Bgathered%7D)
Now, to find the wholesale price if the sales price is $1.99, we just need to evaluate s = 1.99 on the function we created.
![w(1.99)=\frac{1.99-0.25}{1.5}=1.16](https://tex.z-dn.net/?f=w%281.99%29%3D%5Cfrac%7B1.99-0.25%7D%7B1.5%7D%3D1.16)
The wholesale price is $1.16.