To cultivate new rice varieties, if the first generation gets 120 seeds, and from the first generation to the next generation, each seed of the next generation will get 120 seeds, and the seeds of this new rice variety can be obtained in the nth generation______ A grain

To cultivate new rice varieties, if the first generation gets 120 seeds, and from the first generation to the next generation, each seed of the next generation will get 120 seeds, and the seeds of this new rice variety can be obtained in the nth generation______ A grain

It should be 120N grains

A batch of 120 soybean seeds were divided into two times germination test; the first 8 seeds died; the survival rate was 90%; the second 39 seeds survived; what was the survival rate of this batch of soybean

8 / (1-90%) = 80 seeds (used for the first time)
80-8 = 72 seeds (first survival seeds)
72 + 39 = 111 (total survival seeds)
111/120*100%＝0.925*100%＝92.5%

Xiaoli planted petunia in front of her house. The first time she sowed 120 seeds, 80 seeds germinated. The second time she sowed 80 seeds, 70 seeds germinated. The germination rate of these seeds was 100%

120 + 80 = 200 (grains)
80 + 70 = 150 (grains)
150÷200=0.75=75%
A: the germination rate of these seeds is 75%