Q7. Many countries have banned the use of the insect other wildlife. The existence of DDT...
Q7. Many countries have banned the use of the insect other wildlife. The existence of DDT was even found s have banned the use of the insecticide DOT because of its harmful effects on existence of DDT was even found in whales or polar bears living in the arctics. suppose the mass of DDT that remains at a particular location after 10 kg of DDT was sprayed is 10(0.944)*: ythe mass of Tik ethe number of years since the spraying a. Determine how much DDT, to the nearest mine how much DDT, to the nearest hundredth of ka, would be present 15 years after the spraying. (2 points) b. When would the mass DOT reach 2 kg? (4 points) Q8. John is a fruit grower in Lake Okanagan valley. He has planted and tracked the growth of a new variety of cherry trees he is considering planting on his farm. The age of tree in years (x) and the height of cherry trees in feet (H) has the following relationship: H = 6.36lnx + 5.56. There is a very beautiful cherry tree, full of yellow, pink and black cherries at the same time, measured as 15 feet tall. Estimate how long ago it was planted. (4 points)