Answer:
Speed of boat in still water is 6km/h
Speed of current is 4km/h
Step-by-step explanation:
We know speed = distance / time
Let the speed of boat in still water be x
Let the speed of current be y
Hence the speed of boat, down stream = 
Distance downstream = 20km
Time taken = 2 hours
We have

......(1)
Speed of boat upstream = 
Distance upstream = 4
Time taken = 2
We have

...(2)
Adding (1) & (2)


Substituting in (1) we get

Answer:
The sales will surpass 37 million in about 2013.
Step-by-step explanation:
The answer can be found via solving an exponential inequality as follows:

Any number of years larger than 12.6 will satisfy the inequality, i.e., after more than 12.6 years from year 2000, the annual sales will surpass 37 million. The answer to the exact question will then be: in about 2013 the sales will surpass 37 million.
Step-by-step explanation:
The answer is A. (x - 4)(x - 12).
Y/2 minus x or the other way around. hope this helped ♡♡♡
Answer:
6x = 54; x = 9 times older
Step-by-step explanation: