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bogdanovich [222]
3 years ago
5

I don’t understand the word problem.

Mathematics
1 answer:
brilliants [131]3 years ago
6 0

Remark

The population that is middle class  is (4/5) * 2000 * 4/5 = 8000/5 = 1600

The others are 2000 - 1600 = 400 which should be 1/5 of the population.

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Write a equation that passes through the points 5,2 and 2,8
Rama09 [41]

Answer:

y = -6/3x + 8

Step-by-step explanation:

3 0
3 years ago
~ P L E A S E ~ H E L P ~ M E ~ O U T ~
DerKrebs [107]
Formula for area of a circle: Pi * R^2.
Radius = diameter/2
Radius = 16m/2
Radius = 8m

Formula and equation:
Pi * (8)^2
= Pi * 64m2
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7 0
3 years ago
A cylinder closed tin of radius r cm is made from 600cm2 tin sheet of metal.
Zarrin [17]

Answer:

Note:  The expression "h =300- pi r /pi r" would equate to 299, as written.  I find h = (300 - πr^{2} )/πr to be the equation for height.

Step-by-step explanation:

The total surface area of a sylinder is 2πr(h+r) where h is the height and r is the radius.  That consists of top and bottom disks, each with an area of πr^{2}, for a total of 2πr^{2}.  The side is a  continous sheet that has an area of 2πrh, where h is the height.  2πr is the circumference of the can, so the surface area of the side is 2πrh.

The total surace area of a closed cylinder is therefore 2πr^{2} + 2πrh.

2πr^{2} + 2πrh = 600

πr^{2} + πrh = 300

πrh = 300 - πr^{2}

h = (300 - πr^{2} )/πr

7 0
3 years ago
SEE QUESTION IN IMAGE
Alinara [238K]

Answer:

  • B. 48°

Step-by-step explanation:

∠OST = 90° as ST ⊥ OS (tangent is perpendicular to radius at same point)

m∠OSP = 1/2(180° - m∠SOP) = 90° - 96°/2 = 42° (sum of interior angles of the triangle SOP)

m∠PST = 90° - m∠OSP = 90° - 42° = 48° (angle addition postulate)

Correct choice is B

7 0
3 years ago
F(x) = 3x2<br> g(x) = 3 - 2x
rosijanka [135]

f

(

3

−

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x

)

=

27

−

36

x

+

12

x

2

5 0
3 years ago
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