Each box weighed 10.24 kilograms because you would divide the weight they gave you by how many boxes were inside.
Answer:

Step-by-step explanation:
The given equation is:

so, we first isolate the exponential form that contains the unknown "z" in the exponent, by dividing both sides by 0.5:

Now we bring the exponent down by applying the natural log function on both sides, and then solve for "z":

Divide total miles by miles per gallon:
364 miles / 20 miles per gallon = 18.2 gallons