If A = {2,4,6,8,}, write the set A by description method

Step-by-step explanation:

Set-builder notation is a notation for describing a set by indicating the properties that its members must satisfy.

C={2,4,6,8}

C={2×1,2×2,2×3,2×4}

thus set builder form is:

{x:x=2n,n∈N} and this set is also call even number set in description mathod

triangle and cube

step-by-step explanation:

the answer is b.

64

step-by-step explanation:

c=2πr=2·π·8≈64