1h----------------> 70x3=210 bacteria
2h-----------------> 210*3=630 bactaeria
let be y the number of bacteria at the t=0h
it is y=70 3^0
for t= 1h
y=70*3^1=210
for t=2h
y=70*3^2=630
so we can write y=70*3^x, where x is the number of hour
Three types of radioation - Alpha, Beta, Gamma. hope this helps
Carbon isn’t because all the others on the list are naturally made apart from carbon which is man made because of all the pollution . X
where are the answer choises
