The circumference of a circle varies directly as the diameter of a circle. When the diameter of a circle is 5, the circumference

Question

3 years ago

7

of the circle is approximately 15.7. What is the approximate circumference of a circle with a diameter of 9? Round answer to nearest tenth.

2 answers:

Naya [18.7K] · Answer 1 · 2022-05-24T13:41:13+03:00

Answer:

20.3 units

Step-by-step explanation:

Write and solve an equation involving ratios:

5 units 15.7 units

------------- = ----------------

9 units C

Cross-multiplying, we get 5C = 9(15.7), with C measured in "units."

Then 5C = 141.3, so that C = 141.3 units / 5 = 20.3 units.

mojhsa [17] · Answer 2 · 2022-05-24T15:40:02+03:00

5 0

Answer: 28.3

Step-by-step explanation: