-29.7 + (-11.6) =
First, simplify your brackets. / Your problem should look like:
Second, subtract. / Your problem should look like:

Answer:
-41.3
The formula for circumference is C = πd.
We can just use the approximate for π, which is 3.14
No we have everything we need and just need to plug our numbers in.
C = 3.14 x 6
C = 18.84ft
Make sure to check what the question is asking for. Some questions say to use 3.14, and others say to use the π symbol on the calculator. They give slightly different answers.
If it does say to use the π symbol, make sure to check how they want you to round it.
Hope this helps!
Answer: The answer is the first explanation.
Step-by-step explanation: We are given five different options and we are to select which explanation is correct to derive the formula for a circumference of a circle.
Let 'C' be the circumference and 'd' be the diameter of a circle. Now, we will write the ratio of the circumference to the diameter as

Also, we know that

And diameter of a circle is twice the radius, so

Therefore,

This is the formula for the circumference of a circle. Since this explanation matches exactly with the first option, so the correct option is
(a). Find the relationship between the circumference and the diameter by dividing the length of the circumference and length of the diameter. Use this quotient to set up an equation to showing the ratio of the circumference over the diameter equals to π . Then rearrange the equation to solve for the circumference. Substitute 2 times the radius for the diameter.