Government Economists of a Developing Country Determined That the Purchase

Short Answer

Government economists of a developing country determined that the purchase of imported perfume is related to a proposed "luxury tax" by the formula , , where N(x) measures the percentage of normal consumption of perfume when a "luxury tax" of x% is imposed on it.
​
Round the answers to two decimal places.
​
Find the rate of change of N(x) for tax of 20%.
​
__________
​
Find the rate of change of N(x) for tax of 100%.
​
__________
​
Find the rate of change of N(x) for tax of 160%.
​
__________