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

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.

28.3

Step-by-step explanation:

answer:

c 60% on edg