19. According to a soil analysis, a certain lawn requires an application of 40.0 kg of nitrogen phosphate when the average temperature is 75.0°F. To avoid burning the grass, the required application amount decreases 1.2 kg for each 1.0°F that the average temperature is above 75°F. To the nearest 0.1 kg, what is the required application amount of nitrogen phosphate when the average temperature is 83.0°F?

Answer and Explanation

Your Answer is

Correct Answer is A

Explanation

When the temperature rises by 1, the dosage decreases by 1.2kg, and the temperature rises by 8, so it reduces by 9.6kg, choose A