<span>D. measuring radioactive decay of element isotopes </span>
Answer:
Millimeter, Centimeter, meter, kilometer
Explanation:
K H D M D C M
This is what I say to remember them
Kick Him Down Mommy Don't Commit Murder
Answer:
Draw the vector triangle (head to tail)
Let 8 be adjacent and 4 the opposite side
tan theta = 4 / 8 = .5
theta = 26.6 deg