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MA_775_DIABLO [31]
3 years ago
9

Which number sentence could be used to solve this problem?

Mathematics
2 answers:
galina1969 [7]3 years ago
3 0

Answer:

45 ×6 = y because each one strip is 6 inches long and you have 45 of them

Goshia [24]3 years ago
3 0

<em>Answer:</em>

<em>The last one which would be 45 x 6 = y </em>

<em>Step-by-step explanation:</em>

<em>If the ball of yarn was cut up into 45 stripes that each measure 6 inches long then you would have to multiply 45 x 6 which equals 270 inches so there was 270 stripes in the ball of yarn to begin with</em>

<em></em>

  • <em>Hope this helps</em>
  • <em>Hope this us right</em>
  • <em>Brainliest plz</em>
  • <em>Have a nice day</em>
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Find the mass of the solid paraboloid Dequals=​{(r,thetaθ​,z): 0less than or equals≤zless than or equals≤8181minus−r2​, 0less th
Lubov Fominskaja [6]

Answer:

M = 5742π  

Step-by-step explanation:

Given:-

- Find the mass of a solid with the density ( ρ ):

                             ρ ( r, θ , z ) = 1 + z / 81

- The solid is bounded by the planes:

                             0 ≤ z ≤ 81 - r^2

                             0 ≤ r ≤ 9

Find:-

Find the mass of the solid paraboloid

Solution:-

- The mass (M) of any solid body is given by the following triple integral formulation:

                           M = \int \int \int {p ( r ,theta, z)} \, dV\\\\

- We can write the above expression in cylindrical coordinates:

                           M = \int\limits\int\limits_r\int\limits_z {r*p(r,theta,z)} \, dz.dr.dtheta \\\\M = \int\limits\int\limits_r\int\limits_z {r*[ 1 + \frac{z}{81}] } \, dz.dr.dtheta\\\\

- Perform integration:

                           M = \int\limits\int\limits_r{r*[ z + \frac{z^2}{162}] } \,|_0^8^1^-^r^2 dr.dtheta\\\\M = \int\limits\int\limits_r{r*[ 81-r^2 + \frac{(81-r^2)^2}{162}] } \, dr.dtheta\\\\M = \int\limits\int\limits_r{r*[ 81-r^2 + \frac{6561 -162r + r^2}{162}] } \, dr.dtheta\\\\M = \int\limits\int\limits_r{r*[ 81-r^2 + 40.5 -r +\frac{r^2}{162} ] } \, dr.dtheta\\\\M = \int\limits\int\limits_r{[ 121.5r-r^2 -\frac{161r^3}{162} ] } \, dr.dtheta\\\\

                           M = 2*\int\limits_0^\pi {[ 121.5r^2-r^3 -\frac{161r^4}{162} ] } |_0^6 \, dtheta\\\\M = 2*\int\limits_0^\pi {[ 121.5(6)^2-(6)^3 -\frac{161(6)^4}{162} ] }  \, dtheta\\\\M = 2*\int\limits_0^\pi {[ 4375-216 -1288] }  \, dtheta\\\\M = 2*\int\limits_0^\pi {[ 2871] }  \, dtheta\\\\M = 5742\pi  kg              

- The mass evaluated is M = 5742π                      

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I think the answer is B
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the first week she earned 3 times as much as she earned the second week.The second week she earned twice as much as she earned t
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$6. 

You can get this by dividing the original number by 3 and then the new answer by 2. 
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2. Write the equation of the line that passes
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Answer:

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Combine the like terms to create an equivalent expression:<br> -3r- 6+ (-1)
Norma-Jean [14]

Answer:

-3r+5 is that answer hdj

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