A1 A corn kernel weighs approximately $8 \cdot 10^{-2} \mathrm{~g}$. Approximately how many corn kernels are there in 1 ton of corn?
(A) 12500000
(B) 1250
(C) 1250000
(D) 8000
(E) 80000
A1. The number of corn grains is $\frac{1000 \mathrm{~kg}}{8 \cdot 10^{-2} \mathrm{~g}}=\frac{10^{6} \mathrm{~g}}{8 \cdot 10^{-2} \mathrm{~g}}=12500000$.