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3 years ago

5

95% of what number is 57

2 answers:

dalvyx [7]3 years ago

8 0

To get this answer you set up an equation. 0.95x=57. You then divide both sides by 0.95 giving x=57/0.95 which equals x=60. Therefore, the what number is 60 because 60*0.95=57.

Serga [27]3 years ago

8 0

When u set up the answer- however you do it - you can get 60 if you work it out the right way?

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A student on a piano stool rotates freely with an angular speed of 2.85 rev/s . The student holds a 1.50 kg mass in each outstre

Vlad1618 [11]

Answer:r'=0.327 m

Step-by-step explanation:

Given

$N=2.85 rev/s$

angular velocity $\omega =2\pi N=17.90 rad/s$

mass of objects $m=1.5 kg$

distance of objects from stool $r_1=0.789 m$

Combined moment of inertia of stool and student $=5.53 kg.m^2$

Now student pull off his hands so as to increase its speed to 3.60 rev/s

$\omega _2=2\pi N_2$

$\omega _2=2\pi 3.6=22.62 rad/s$

Initial moment of inertia of two masses $I_0=2mr_^2$

$I_0=2\times 1.5\times (0.789)^2=1.867$

After Pulling off hands so that r' is the distance of masses from stool

$I_0'=2\times 1.5\times (r')^2$

Conserving angular momentum

$I_1\omega =I_2\omega _2$

$(5.53+1.867)\cdot 17.90=(5.53+I_o')\cdot 22.62$

$I_0'=1.397\times 0.791$

$I_0'=5.851$

$5.53+2\times 1.5\times (r')^2=5.851$

$2\times 1.5\times (r')^2=0.321$

$r'^2=0.107009$

$r'=0.327 m$

7 0

3 years ago

30 points to anyone that can answer correctly in probability.

IrinaVladis [17]

Formula: P(A or B)=P(A)+P(B)-P(A or B)

p(c)=7/18

p(s)=6/18

p(c or s)=2/18

0.39+0.33-0.11=

answer:0.61

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Strike441 [17]

Answer:
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3 years ago

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Gemiola [76]

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3 years ago

a used bookstore will trade two of its books for three of us and they'll brings and 18 books to trade how many books can she get

Gemiola [76]

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6x2=12
She can get 12 books from the store

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3 years ago