Given :
a paddle boat travels upstream = 12 miles
a paddle boat travels downstream = 20 miles
speed of the current = 2 miles per hour
Let the speed of the boat =x
Let the time taken = t
We know the distance for upstream D= (boat speed - current speed) * time
the distance for downstream D= (boat speed + current speed) * time
Plug in all the values and variables in the distance
For upstream 12 = (x-2)t, then 
For downstream 20 = (x+2)t then 
we got two equations for t, equate it and solve for x
Cross multiply it
12(x+2) = 20(x-2)
12x + 24 = 20x - 40 (subtract 12x and add 40 on both sides)
64 = 8x
x= 8
the speed of the boat in still water = 8 miles per hour
48 is the answer my friend. x is 45 more than y. 3+45 is 48
4/16=.25
$0.25/oz
Each ounce is 25 cents. Multiply .25 by 16 and you get 4.
Answer:
The value at the end of the fifth year (a5) is equal to $5,696.
As the number of years n is the exponent of a number that is smaller than 1, the value of the car is decreasing with the years.
We also can conclude that the value of the car decreases 25% each year.
Step-by-step explanation:
The value of the car is represented by an=24000(3/4)^n, where n is the year.
The value at the end of the fifth year (a5) is equal to:
As the number of years n is the exponent of a number that is smaller than 1, the value of the car is decreasing with the years.
We also can conclude that the value of the car decreases 25% each year:
