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Elanso [62]
3 years ago
8

The __________ are tissues where gases from the air and the blood are exchanged.

Mathematics
2 answers:
Artyom0805 [142]3 years ago
7 0

air sacs or alveoli the lungs and blood 3 transport

 of respiratory gases

andrew11 [14]3 years ago
5 0

Answer: alveoli

Step-by-step explanation:

The exchange of gases from the air and the blood occur in the alveoli tubes. These are tiny tubes where the oxygenated air diffuse inside the lungs from the respiratory tract and the oxygen is added up to the blood and the carbon dioxide is expelled out by following the same root.  This way the deoxygenated blood get purified with the oxygenated blood.

On the basis of the above explanation,The __alveoli________ are tissues where gases from the air and the blood are exchanged.

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while visiting a mountain, John approximated the angle of elevation to the top of a hill to be 25 degrees. Alfter walking 350 fe
strojnjashka [21]
There are several ways of going about this problem, but just know that it all boils down to triangles and the rules/laws of triangles.
So we start by making a large right triangle, because the hill is vertical with the horizontal ground, with 25° as the left angle (where John looks up to top), 90° is the right angle (where ground meets hill base). So we see that the top side of the triangle is the hypotenuse, and equals the line of sight from John to hilltop.
Now we've got additional information that if John walks 350ft towards the hill, his angle of elevation increases by 14. So that = 25+14 = 39. How does that possibly help us?? Well now we can make 2 triangles inside of the one we've already made. So that now we have the triangle base split between the left angle of 25° and where he stopped 350ft to the right of that.
Now the supplement of 39 is 141, and the remaining piece of that too left triangle = 180-25-141 = 14. What does that mean? Well now we have a triangle, where we know all 3 angles and 1 side --> we can find another side by the law of sines:
If a, b and c are the lengths of the legs of a triangle opposite to the angles A, B and C respectively; then the law of sines states:
a÷sinA = b÷sinB = c÷sinC
We really need the hypotenuse to then find our hill height, so we'll make hypotenuse = side b in attached image. That being so, then its opposite angle (B) = 141. And the top right angle (C) = 14 with its opposite side (c) = 350ft.
Now we only need b÷sinB = c÷sinC
So b/sin141 = 350/sin14 --> b = 350sin141/sin14 = 350×.63/
b = 220.3/.24 = 910.47 ft
Now that's our hypotenuse, so using our original large right triangle, we can use right triangular trig. to solve. Let's make the right side, our hill height, equal to x.
Sin ¥ = opp. side / hypotenuse -->
Sin ¥ = x / hypotenuse
Sin25 = x / 910.5
x = 910.5×sin25 = 910.5×.423
x = 384.8 ft

3 0
3 years ago
The set of points P(0, 3), Q(2, 0), R(4, -3) are collinear and the line has a slope of _____.
vampirchik [111]

Answer:

slope = -1.5

Step-by-step explanation:

A set of three or more points are said to be collinear if they all lie on the same straight line.

We have been given the following collinear set of points;

P(0, 3), Q(2, 0), R(4, -3)

This implies that P, Q, and R lie on the same line.

The slope of a line is defined as; (change in y)/(change in x)

Using the points P and Q, the slope of the line is calculated as;

(0-3)/(2-0) = -3/2 = -1.5

7 0
3 years ago
Read 2 more answers
Which point on the<br> graph represents<br> the y-intercept?
kozerog [31]

Answer:

point B

Step-by-step explanation:

The y- intercept is the point where the graph crosses the y axis

7 0
2 years ago
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I need assistance if anyone would be so kind.
uysha [10]
He shoots 20 arrows
6 0
2 years ago
Find the remainder when x⁴+x³-2x²+x+1 divided by x+1​
Zolol [24]

Answer:

\frac{-2}{x+1}

Step-by-step explanation:

x^3-2x+3-\frac{2}{x+1}

also if ur brainly staff and seeing this

plz remove/delete my account asap tysm

5 0
3 years ago
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