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ICE Princess25 [194]
3 years ago
10

In a random sample of 400 people who were questioned regarding their participation in sports, 160 said that they did participate

. find a 98% confidence interval for p. put your answers in interval notation i.e. (a,
b.and round your answers to 3 decimal places.
Mathematics
1 answer:
Scilla [17]3 years ago
8 0
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FrozenT [24]
The answer you get is  112
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4 years ago
What value of x is in the solution set of 2x – 3 > 11 – 5x?
Alla [95]

2x-3>11-5x

Simplify both sides of the equation

2x-3>-5x+11

Add 5x to both sides

2x-3+5x>-5x+11+5x

7x-3>11

Add 3 to both sides

7x-3+3>11+3

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I hope that's help !

5 0
3 years ago
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A tank is full of water. Find the work (in ft-lb) required to pump the water out of the spout. Use the fact that water weighs 62
Leno4ka [110]

The Work required to pump water out of the spout  would be equal to 464,062.5 π

<h3>How can we calculate the work done?</h3>

Given data :

3 ft, 4 ft, 5 ft A right triangular prism tank with a spout is given.

weight of water = 62.5 Ib/ft³

inner radius ( r ) = 3 x 2 =6 ft

Outer radius ( R ) = 3 x 4 = 12 ft

Height ( h ) = 3 x 5 = 15 ft

To determine the work required to pump water out of the spout

y = Vertical distance

dv = cross-section volume

dw = weight

The radius of the tank

Radius = ( r - R ) y/h + R

Radius = ( 6 - 12 ) y/15 + 12

So, Radius = 12 - 0.4y

dv ( cross section volume )

\pi r^2\\\\\pi (12 - 0.4y)^2dy\\

Weight of cross-section ( dw ) = 62.5 ( 12.5 - 0.4y )² π dy

The work done to pump water out of the spout will be

Work done =  ∫¹⁵₀ 62.5 ( 12.5 - 0.4y )² π dy

∴ Work done ( W ) = 464,062.5

Hence we can conclude that the Work required to pump water out of the spout  would be 464,062.5 π

Learn more about work here;

brainly.com/question/13148947

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4 0
2 years ago
What would you get if you divided a half of a half of a half by a half of a fourth of a half?
BartSMP [9]
I think the question is 1/6 ÷ 1/6, which im pretty sure would be 1/3
4 0
3 years ago
What should be added to 4x²-3x²+1 to make it a perfect square​
Vlad1618 [11]

im \: guessing \: its \: 4x {}^{2}  - 3x + 1 \\ (correct \: me \: if \: im \: wrong)

(a - b) {}^{2}  = a {}^{2}   - 2ab +  {b}^{2}

4x {}^{2}  = a {}^{2}  \:  \:  \:  \:  \:  \:  \:  \:  \:  \:  \: b {}^{2}  = 1 \\ a = 2x \:  \:  \:  \:  \: \:  \:  \:  \:  \:  \:  \:  \:  \: b = 1

(2x - 1) {}^{2}  = 4x {}^{2}   -4x + 1

we \: need \: to \: add \: a \: - x \\ \: to \: the \: original \: equation

<h2>Note that this problem can be approached in many ways. For instance, we can add to the b² term instead of changing the middle term...</h2>
8 0
2 years ago
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