For which data set is the mode most useful?

A.{ 8, 12, 8, 14, 14, 20 }
B. { 1, 2, 3, 4, 5 }
C. { 32, 36, 41, 36, 40}
D. { 4, 4, 6, 6, 8, 8 }

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

25

step-by-step explanation:

1) is right

step-by-step explanation: