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valentina_108 [34]
2 years ago
14

A barrel of crude oil contains 5.61 cubic feet of oil. How many barrels of oil are contained in 1 mile (5280 feet) of a pipeline

that has an inside diameter of 6 inches and is completely filled with oil? How much is "1 mile" of oil in this pipeline worth at a price of $100 per barrel?
Mathematics
1 answer:
amm18122 years ago
6 0

Considering the volume of a cylinder, we have that:

  • There are 185 barrels of oil in the pipeline.
  • One mile of oil is worth $18,500.

<h3>What is the volume of a cylinder?</h3>

The volume of a cylinder of radius r and height h is given as follows:

V = \pi r^2h

Considering that the radius is half the diameter, and that each inch has 0.0833 feet, the parameters in feet for this problem are given as follows:

r = 0.25, h = 5280.

Hence the volume in cubic feet is:

V = 3.14 x (0.25)² x 5280 = 1036.2 feet³.

The number of barrels in this pipeline, considering the volume of a single barrel, is given as follows:

1036.2/5.61 = 185 barrels.

The worth of 1 mile of oil, considering the price of $100 per barrel, is given by:

185 x 100 = $18,500.

One mile of oil is worth $18,500.

More can be learned about the volume of a cylinder at brainly.com/question/9408912

#SPJ1

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Fred the owl is looking down at a 67° angle from the top of a tree that is 15 ft tall, when he spots a bird on the ground. How f
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Answer:

Fred     C. 16.30 ft

Gary     B. 169.67 m

Step-by-step explanation:

Fred the owl...

Always <u>draw a diagram first</u> (see diagram below). We assume trees are perpendicular (at 90°) to the ground. The situation forms a right-angle triangle.

We need to <u>find "x"</u>, which is the direct distance between the owl and the bird. "x" is also the hypotenuse, which is the longest side in a right-angle triangle. Since we know a side and an angle, we can find the hypotenuse using primary trigonometry ratios.

∠B will be the angle of reference (the angle we are "talking" about). The side we know is opposite to ∠B (15ft). We know it's opposite because it's not touching the angle. The side we need to find is the hypotenuse.

<u>Use the trig. ratio sine</u> because it has opposite and hypotenuse in it. The general formula is:

sinθ = opp/hyp

θ means the angle, and we know it is 67°.

Replace all the information you know:

sinB = opp/hyp

sin67° = (15ft) / x     Isolate "x". Rearrange the equation.

xsin67° = (15ft)         Divide both sides by sin67°

x = (15ft) / sin67°

x = 16.295... ft   Exact answer in decimals

x ≈ 16.30 ft     Rounded to nearest hundredth

Therefore Fred the owl is 16.30 feet from the bird.

Gary spots a monkey...

Draw a diagram first (see below). G is Gary, M is the monkey, T is the bottom of the Sears Tower. We need to <u>find "x"</u>, which is the distance between the monkey and the bottom of the tower.

The angle of reference is M, which is 69°. We need to find the adjacent side and we know the opposite side. <u>The trig. ratio that has adjacent and opposite is tangent.</u>

tanθ = opp/adj

Replace all the information you know:

tanM = opp/adj

tan69° = (442m) / x    Rearrange the formula to isolate "x"

xtan69° = 442m         Divide both sides by tan69°

x = 442m / tan69°      Solve by dividing

x = 169.6679.... m    Exact decimal answer

x ≈ 169.67m            Rounded to the nearest hundredth

Therefore the monkey is 169.67 metres from the tower.

Remember all the trig. ratios using the acronym SohCahToa.

o = opposite side

a = adjacent side

h = hypotenuse side

S = sine, sin for short

C = cosine, cos for short

T = tangent, tan for short

The operation is always dividing the first side in the acronym by the second side.

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tanθ = opp/adj

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