Mathematics, 29.09.2019 01:20 anglacx5465
Acylindrical metal pipe has a diameter of 20 millimeters and a height of 21 millimeters. a cylindrical hole cut out of the center has a radius of 6 millimeters.
which expressions represent the volume of metal needed, in cubic millimeters, to make the pipe? check all that apply.
21π(10)2 – 21π(6)2
π(20)2(21) – π(6)2
2,100π – 756π
7,644Ï€
1,344
answer is choice 1 and 3.
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