Jonas raced 7/8 of his history assignment on friday. what percentage represents the part of his assignment he did not read on friday?

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❖ He didn't read 1/8.

8/8 - 7/8 = 1/8

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The did not read 1/8 parts of his assignment.

Option (a) is correct.

The volume of given cone is 72π cubic units.

Step-by-step explanation:

Given : A cone has a diameter of 18 units and height of 8 units.

We have to determine the volume of the given cone.

We know Volume of cone =

Where r is radius of cone

h is the height  of cone

Given : diameter = 18units  so, radius is half of diameter = 9 units

height = 8 units

Substitute, we have,

Volume of cone =

Simplify, we have,

Volume of cone =

Thus, the volume of given cone is 72π cubic units.

Option (a) is correct.