A company invests a total of $20 comma 000 of surplus funds at two annual rates of interest: 5% and 6 three fourths%. Is wishes an annual yield of no less than 6one half%. What is the least amount of money that the company must invest at the 6 three fourths% rate

Which one of the following statements is true? ddt does not prevent disease from passing from agricultural animals to humans. cost was a major factor in the united states government's decision to ban ddt. many african governments concluded that the potential long-term health effects of ddt were not as serious as the immediate problem of insect control. ddt cannot accumulate in the fat of animals. the ddt ban in the united states has made it very difficult to control agricultural insect pests.