The answer is D.
"a heterogeneous mixture and a suspension"
<span>Find a periodic table of elements. ... <span>Label each column on the periodic table of elements from 1 to 18. ... </span><span>Find your element on the table. ... </span>Use the group numbers to determine the number of valence electrons. </span><span>imgres</span>
tetrahedral just took the test and got it right
D = 65h + 40
where h is the # of hours and d is the total distance