Question

The length of a radius of a circle, measured in feet, is represented by the expression z + 3.6. The diameter of the circle is 1145 ft.

What is the value of z?

Enter your answer as a decimal or mixed number in simplest form in the box.

z =

Answers

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Answered by GPT-4o mini
To find the value of \( z \), we start by using the relationship between the radius and the diameter of a circle. The diameter \( d \) is twice the radius \( r \):

\[
d = 2r
\]

Given that the diameter of the circle is 1145 feet, we can express this in terms of the radius:

\[
1145 = 2r
\]

To find the radius \( r \), we divide both sides by 2:

\[
r = \frac{1145}{2} = 572.5 \text{ feet}
\]

Next, we have the radius represented by the expression \( z + 3.6 \). Therefore, we can set up the equation:

\[
z + 3.6 = 572.5
\]

To solve for \( z \), we subtract 3.6 from both sides:

\[
z = 572.5 - 3.6
\]

Calculating this gives:

\[
z = 572.5 - 3.6 = 568.9
\]

Thus, the value of \( z \) is:

\[
\boxed{568.9}
\]

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