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3 years ago

What is the volume of a object whose disney is 10.5 gml and has a mass of 100 gr

Mathematics

1 answer:

Anton [14]3 years ago

4 0

Answer:

V = 9.52381 L

Explanation:

V= mass/density

V=100/10.5

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Can you guys help me find 1/3 + 5/6 please!

JulsSmile [24]

Answer:

7/6

Step-by-step explanation:

1/3=2/6

2/6+5/6=7/6

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3 years ago

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It takes 40 minutes for 8 people to paint 4 walls. how many minutes does it take 10 people to paint 7 walls?

timurjin [86]

Its not 70 its 56, because you have to see how many minutes it takes for 1 to do 4 walls which would be 40*8.
Then you have to see if how many minutes its take a person to do one wall which is 8*40/4 from getting the amount of the 1 person doing 4 walls and get 80.
Then you need to see how many walls a person can paint 7 walls out of 10 people.So, we know how many minutes for each wall which is 80 and then multiply it by 7 to get 560 and divide it by 10 to get a product of 56.

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3 years ago

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Natalie saved $20 when she purchased a new phone. The phone originally cost $125. What percent savings did Natalie receive on th

Free_Kalibri [48]

15% I think, I’m pretty sure I’m right

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3 years ago

Find the equation of a line that contains the points (-8, 7) and (-8, -2). Please help!!!

FrozenT [24]

Answer:

x = -8

Step-by-step explanation:

(-8, 7) and (-8, -2)

m=(y2-y1)/(x2-x1)

m=(-2-7)/(-8+8)

m=(-9)/0

m = undefined slope or no slope

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3 years ago

What is cos theta when sin theta = sqrt 2/3

Fittoniya [83]

Answer:

Value of cosθ is ±√7/3 .

Step-by-step explanation:

According to the Question , value of :

$\red{\implies sin\theta = \dfrac{\sqrt2}{3}}$

And , we know the identity of sine and cosine as ,

$\boxed{\pink{\sf\implies sin^2\theta + cos^2\theta = 1} }$

Using , this identity we have ;

$\implies sin^2\theta + cos^2\theta = 1 \\\\\implies \bigg( \dfrac{\sqrt2}{3}\bigg)^2 + cos^2\theta = 1 \\\\\implies \dfrac{2}{9} + cos^2\theta = 1 \\\\\implies cos^2\theta = 1 - \dfrac{2}{9} \\\\\implies cos^2\theta = \dfrac{9-2}{9} \\\\\implies cos\theta = \sqrt{\dfrac{7}{9}} \\\\\underline{\boxed{\blue{\bf \implies cos\theta = \pm \dfrac{\sqrt 7 }{3}}}}$

Now , here since θ is in 2nd quadrant and in 2nd quadrant cos is negative . Hence ,the value of cos will be :

$\boxed{\orange{\bf \implies cos\theta =-\dfrac{\sqrt7}{3}}}$

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3 years ago