Answer:
Step-by-step explanation:
Exponential equations can be written as

in this case,
a = 5000 (the starting amount)
we just have to find b
![10000 = 5000b^4\\20000 = 5000b^8\\\\b^4 = 2\\b^8 = 4\\\\\\b = \sqrt[4]{2}](https://tex.z-dn.net/?f=10000%20%3D%205000b%5E4%5C%5C20000%20%3D%205000b%5E8%5C%5C%5C%5Cb%5E4%20%3D%202%5C%5Cb%5E8%20%3D%204%5C%5C%5C%5C%5C%5Cb%20%3D%20%5Csqrt%5B4%5D%7B2%7D)
![y = 5000(\sqrt[4]{2})^x](https://tex.z-dn.net/?f=y%20%3D%205000%28%5Csqrt%5B4%5D%7B2%7D%29%5Ex)
The answer to the question is 12
D=6b Since that you want to know the cost of the amount of boxes of strawberries you have bought. The cost is dependent on the number of boxes you have which is why the equation is d=6b. Hope this helps. :)