Use the graph below to determine the range of values in which the threshold level of this pollutant lies. Dose-response curve shows ten percent of the population died when exposed to thirty milligrams of pollutant A per kilogram of water. Twenty percent of the population died when exposed to thirty-eight milligrams of pollutant A per kilogram of water. Forty percent of the population died when exposed to forty-two milligrams of pollutant A per kilogram of water. Fifty percent of the population died when exposed to forty-five milligrams of pollutant A per kilogram of water. One hundred percent of the population died when exposed to one hundred milligrams of pollutant A per kilogram of water. Between 0 and 10 mg/kg Between 10 and 20 mg/kg Between 40 and 50 mg/kg Between 50 and 60 mg/kg

Ithink that the answer is c

Idon’t think it’s true but if it is then you should make up a case then prove it

It would. a painted portrait would be an important thing because they are official and take real artists to paint and if it was a painted portrait it would mean that there's seriousness and a desire to work together. portraits are maybe even more so important today because they are not a mainstream thing and are made only when we want to impress someone since they take time and will.sending a picture would not be the same as sending a portrait because a picture is just taken with a camera and there's no soul to it. if a picture is a painted one then it can reaffirm, especially if both states people are in it. if it's just a photograph then there wouldn't be much to it.things today are different because there's photographs everywhere and seeing pictures has lost its meaning since they are so abundant and found everywhere. all newspapers have pictures and just sending the same picture as everyone has would not mean much since it's easily obtainable.  perception of authority has changed over the years because the people trust their governments less and less as years go by. before world war two, governments were trusted and presidents were believed to work for the good of the country. nowadays, everyone is looking out for things that might bring the downfall of governments since it has been shown that governments often do bad things to say in power.