Highlight the Correct Statement that answers the question, Why are three recording stations or
circles necessary to locate the Epicenter of an Earthquake?
a. Three recording stations or circles are most accurate when the earthquake happens on the
surface of the Earth, but a below grade earthquake would only require two recording stations
b. One circle would give your infinite epicenters two circles would give your two epicenters, and
three circles meet in one place, if done correctly
c. One circle would give you one epicenter two circles would give you two epicenters, whereas
three circles would give you three epicenters

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

the correct answer is:

a. formation of precipitation