Iwill give u !

which substance has been changed most over time from its original plant material?

a.

peat

b.

anthracite coal

c.

bituminous coal

d.

lignite

B. Anthracite Coal

Step-by-step explanation:

lowest form is peat, then lignite, then bituminous coal, then anthracite

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.

36 girls

step-by-step explanation:

the 48 boys is 4 parts of the ratio

divide 48 by 4 to obtain one part of the ratio

= 12 ← 1 part of the ratio

3 parts = 3 × 12 = 36 ← number of girls