**Answer:**

D

**Step-by-step explanation:**

Best answer would be D, nuclear transmutation/transmutation refers to "the action of changing or the state of being changed into another form" the word nuclear radiation is radioactive. it's a good guess I would say.

The given statement "A theorem is a statement that can be easily proved using a corollary" is **false.**

**Answer: False**

<u>**Step-by-step explanation:**</u>

A statement that would be proven on the basis of postulates and before proven theorem is called Theorems. "Corollary", a theorem that should come from a previous theorems (part of another statement). Contrary to the definitions, this may be reversible or irreversible if they are presented in the form "if - then."

**Example for theorem: **The measured angles of a triangle added to 180 degree.

The theoretical aspects of geometry consists of definitions, theorems, and postulates. Basically, these are elements of geometric proof.

**Answer:**

m = -19/4

**Step-by-step explanation:**

-7 = m-9/4

-7 + 9/4 = m

(-28+9)/4 = m

-19/4 = m

Density=mass / volume ⇒ mass=density x volume.

Data:

density=3.5 g/cm³

volume=7.0 cm³

mass=(3.5 g/cm³)(7.0 cm³)=24.5 cm³

<span>**answer: 24.5 cm**</span>**³**