Economists note there is a slowdown in labor productivity in the manufacturing sector. explain the impact on economic growth

The manufacturing sector plays a huge role in, the given country's, economic stamina/wellbeing/growth. In saying so, any changes to its productivity will have an impact on a long-term basis on economic growth. In this case, the "slowdown" of labour productivity, may result in lesser demand and supply (Decrease in AD and AS). Becuase AS decreases, prices are driven higher, thus, AD decreases as consumers/households are less willing or able to afford for a high quantity. With a "slowdown" in productivity, firms may consider laying off their human resources, in an attempt to stay healthy. With less company income, there are fewer government taxes from both firms and consumers. The increase in Unemployment means an increase in government benefits. So yeah it's not good for the economy on a long-term basis.

I hope I answered your question. It's a bit jumbled here and there. But if you have further questions, regarding my response, then say so. You are very welcome to :) 

Like many students at university, you may be unhappy about the results you attain in exams. you may feel that even with all you are doing there must be something more -- or different-- you could be doing to get better grades. we have all at some time or other heard of that student who only studies a couple of hours for final exams and scores a's every time. we stand in awe of those who seem to breeze through without undue effort and seem to need very little in the way of studying to nail an exam. the reasons for success, in what i think are the vast majority of cases, are less esoteric than many students think: successful students consistently apply a series of productive strategies with view to attaining clearly identified learning and grade goals throughout the academic term.

True because the skills you do at work and home are different