That's the answer for how is confidence levels determined
Answer:

Step-by-step explanation:
We have the expression:

We can use the power of a product property:

This yields:

We can evaluate 4 to the fourth:

Now, we can use the power of a power property:

So:

Multiply:
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And we're done!
Answer: Because you need more of a smaller unit to equal a larger unit.
Example:
If you want to convert 5km to meters, there must be more meters than kilometers.

Answer:
Let x be the number of pencils Steve bought.
Let y be the number of erasers Steve bought.
x=y+5
0.1x + 0.25y = 1.55
Solving the system, our answer is: (8, 3)
So, she bought 3 erasers.
Let me know if this helps!