For this case we have to:
x: Represents the unknown number
y: Represents the exponent of base 10
So, considering a system of equations we have:

From the first equation we have:

Substituting in the second equation:

We choose the positive value:

So, the number is 0.4.
So:

Thus, the exponent is 5.
Answer:
Yara use 0.4 and
1,3,5
4 looks like true but decreasing but 2 dollars also gives max revenue, so I not sure about it
Sara can make 8 bouquets, with 3 yellow flowers and 2 red ones in each bouquet. How pretty !
Well 1 more cup of chocolate chips since she already put one cup and she needs 2 cups?
Answer: 1 more cup
I hope this helps you
Area=length.width
Area=5.10
Area=50