Answer:

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Work Shown:

You could expand terms out and simplify, but I think it's more handy to leave it in this form so you can easily spot the center and radius from a glance.
There are five significant figures in 12.001
Answer:

Step-by-step explanation:
<u>Equation Solving</u>
We are given the equation:

It's required to solve it for a.
Swap sides to have the letter on the left side:

Divide by
:

It's forming a circle so we know that together it's going to add up to 360. #1 is 66 because angle A trough E is straight and we have 90 on angle ACF and it's vertical to angle FCG. #2 is 125 because angle ACB is 24 because it's vertical to angle GCE. #3 is 114 because 90 and 24 is 114. #4 is 156 because 66 and 90 equal 156.
1. FCG = 66
2. BCD = 125
3. FCB = 114
4. ACG = 156
Logarithmic function.very easy find method 10 log = 1 , 5 log 0.6989700034