Step-by-step explanation:
Go 2.5 units to the right from the origin (0,0) for your x coordinate
Go 2.5 units down from the origin (0,0) for your y coordinate
Where the lines meet is your point.
What is 9 inches? Is 9 inches the diameter? Or the radius? What?
The equation for circumference is pi x diameter.
So assuming the 9 inches is the diameter:
Pi x 9 = 28.2743339
Circumference = 28.274 (3 d.p.)
The atomic mass of an element is the average mass of the atoms of an element measured in atomic mass unit (amu, also known as daltons, D). The atomic mass is a weighted average of all of the isotopes of that element, in which the mass of each isotope is multiplied by the abundance of that particular isotope. (Atomic mass is also referred to as atomic weight, but the term "mass" is more accurate.)
Answer:
See the pic below.
Step-by-step explanation:
I erased the incorrect answers and filled in the correct answers with numbers.
220 .............................
