A city sewer pipe has a diameter of 7 ft and a length of 100 ft. Find the volume of the pipe. Use 3.14 as
2 answers:
Answer:
Step-by-step explanation:
As we do not know the internal radius of the pipe, then to calculate its volume we assume that the pipe is full of water.
This means that the volume of the pipe is the volume of a cylinder with radius and length
The volume of a cylinder is calculated using the following formula:
Then the volume is:
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Answer:
Step-by-step explanation:
This is a linear graph,
Let find the equation of the line
Equation of a line can be determine using
y = mx + c
Where m Is the slope of the graph and c is the intercept on y axis when x = 0
So,
Slope m can be calculated using
Let chose the two point on the x and y axis
P1 = (0,45) and , P2 = (18,0)
m = ∆y / ∆x = y2 - y1 / x2 - x1
m = 0 - 45 / 18 - 0
m = -45 / 18
m = -2.5
So, the intercept on the y axis when x = 0 is 45. Then, c = 45
So, the equation of the line becomes
y = -2.5x + 45
Multiply through by 2
2y = -5x + 90
Where
y is dollars on card, = output
x is the number of rides = input
A. So, we want to find the output when the input is 10, I.e when x = 10
Then,
y = -2.5x + 45
x = 10
y = -2.5 × 10 + 45
y = -25 + 45
y = 20
Then, the output is 20 dollars on card.
B. When the output is 5
I.e y = 5
Then,
y = -2.5x + 45
5 = -2.5x + 45
5-45 = -2.5x
-40 = -2.5x
x = -40 / -2.5
x = 16 rides
The input is 16 number of rides
C. Point P is (7,27.5)
This tells us that when the input is 7, I.e the number of rides is 7, then, the output is 27.5 I.e their are $27.5 dollars on card.
