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3 years ago

8

Andrea can clean a house 4 times as fast as Denise. When they work together, Andrea and Denise can clean a large house in 8 hour

s. How many hours would it take Denise to clean the house by herself?

1 answer:

kifflom [539]3 years ago

4 0

Ummmmhmmm not sure ,but im guessing 32

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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

Which number is the answer

const2013 [10]

Answer:

1

Step-by-step explanation:

32-24 gives you 8

So she only needs one.

7 0

3 years ago

The equation P = 31 + 1.75w models the relation between the amount of Tuyet's monthly water bill payment, P, in

dimulka [17.4K]

Answer:

The "P" intercept, 31, means that Tuyet's monthly water bill would be $31 if he used no water.

Step-by-step explanation:

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3 years ago

How do you find your y-intercept from your x-y points?

PSYCHO15rus [73]

1. To determine the x-intercept, we set y equal to zero and solve for x. Similarly, to determine the y-intercept, we set x equal to zero and solve for y. ...

2. To find the x-intercept, set y = 0 \displaystyle y=0 y=0.

3. To find the y-intercept, set x = 0 \displaystyle x=0 x=0.

5 0

2 years ago

PLEASE HELP ITS DUE IN 10 MINUTES!!!!!

jekas [21]

Answer:

76 Square Feet

Step-by-step explanation:

First, add all the numbers you see up. Your final answer of square feet will be the total you added up as a whole.

24+14+4+6+5+3+15+5= 76

6 0

2 years ago

Read 2 more answers