carry out the following operations as if they were calculations of experimental results. express each anser in the correct units with the correct number of significant figures (3 x 10^4 g +6.827g)/(0.043cm^3 - 0.021 cm^3)

Growing crops in places where major pests don't live using beneficial insects to eat harmful insects using a rat trap instead of a rodenticide developing drought-resistant tomato plants using beneficial insects or natural oils to repel pests planting a different crop every year to fake out the pests keeping food covered to deter ants and rodents developing bean plants with a resistance to fungus picking caterpillars off tomato plants cultivation practice biological control cultural control genetic resistance natural chemicals