Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.
The primary responsibility of air traffic controllers is the separation of aircraft. They control traffic in and around airports and in the terminal and en route airspace in between. Controllers speak directly with pilots, notifying them of traffic or weather in there vicinity.
Answer:They sincerely practice sustainability
Explanation:
What does sustainability means in terms of the environment and it resources ?
Sustainability means we practice using the current resources without outstriping them in a way that may affect their ability to recover naturally or in a way that will affect their availability for the future generation.
They looking after the environment at all cost for example making sure that they don't overfish .
They want to protect their environment by not outstriping the resources or damaging the natural state of the environment which may make its vulnerable.
There are several areas of effective teaching behaviors that a teacher should exhibit in order to become a teacher that can develop his or her students well.
Some of these areas are goal setting and planning, which should be used to monitor the students’ performances; classroom management skills, to ensure that the students are learning in best environment possible; and <u>the answer to the question</u>: motivational skills, to push students to perform better.
The knowledge of cost behavior is important for managerial decision making as, having a thorough knowledge about this enables the manager to predict whether any costs will decrease or increase as business activity changes.
For instance, if a production line is nearing capacity, the relevant cost behavior would be to expect a large cost increase (to pay for an equipment expansion) if incremental demand increased by a small amount. Understanding cost behavior is an essential component of cost-volume-profit analysis.
Learn more about Cost Behavior here
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