Efficiency can best be described as:
o
a. arranging items by order or category.
o
b. the ability to do something well without wasted time or effort.
o
c. a measure of output for any given project, task, or activity.
o
d. doing more than one task at a time.

B efficient is a measurement based on a persons effort Pertaining to any project or task or activity they need to get done

Horizontal asymptote at  tells us that the original graph has been translated down.since  ,  are positive.  also we can say that the point  has a smaller  -coordinate than  .this means that the  transformed exponential function is increasing as it goes to the right. as it goes from  to , the value of the exponential function increases. it goes from to something bigger, . therefore, as  . the left hand would be the side that approaches the horizontal asymptote.so the answer is d