The circumference of a circle changes from 20 to 4 after a dilation. what was the scale factor of the dilation?
a.1/25
b.1/5
c.5
d.25

The answer is the option B

Step-by-step explanation:

we know that

To find the scale factor divide the circumference of the dilated circle by the circumference of the original circle

so

B.

Step-by-step explanation:

Given: The circumference of a circle changes from (pre-image)20 to 4(image) after a dilation.

Then, the scale factor is given by :-

Hence, the scale factor after dilation =

we have the parent function given by,

1. the function is translated 5 units to the left.

so, we get,   becomes

2. the function is translated 5 units to the right.

so, we get,   becomes

3. the function is translated 5 units upwards.

so, we get,   becomes

4. the function is translated 5 units downwards.

so, we get,   becomes

5. the function is reflected across x-axis.

so, we get,   becomes

6. the function is reflected across y-axis.

so, we get,   becomes .

step-by-step explanation:

mark brainliest.