Narrate a right you have witnessed

The point of present perfect (e.g. has witnessed)is that it deemphasizes the time at which the event occured and even the number of times it occured,and emphasizes merely that there was at least one occurrence before the present.

a manufacturer of printed circuit boards uses exponential smoothing with trend to forecast monthly demand of its product. at the end of december, the company wishes to forecast sales for january. the estimate of trend through november has been 200 additional boards sold per month. average sales have been around 1000 units per month. the demand for december was 1100 units. the company uses α = 0.20 and β = 0.10. make a forecast including trend for the month of january.

answer; sensory adaptation;