2) The levels of lead in two bodies of water are rising. In one body of water the initial lead level was 0.04 parts per billion (ppb) and is rising by 0.05 ppb every year. In the second
body of water, the initial lead level was 0.13 ppb and is rising by 0.09 ppb each year.
Which equation can be used to find y, the year in which both bodies of water have the
same amount of lead?
a) 0.04y + 0.05 = 0.13y + 0.09
b) 0.04 + 0.05y = 0.097 + 0.13
c) 0.05 +0.04 = 0.13y + 0.09
d) 0.04 + 0.05y = 0.09 + 0.13