This is the concept of density, volume and mass of different materials; To calculate for the volume of an aluminium material with density of 2.375 grams per cubic centimeter and a mass of 0.78 Kilogram we proceed as follows;
Density=mass/volumemaking volume the subject we get;volume=mass/densitythus;mass=0.78 kg= 780 gdensity=2.375 g/cm^3Hence,volume=780/2.375=328.421 cm^3

4 0

3 years ago

Can someone help mewith this

Vsevolod [243]

Answer:

4 (x-3) (x+3)

= 1/2

6 0

3 years ago

Read 2 more answers

The intensity of a radio signal from the radio station varies inversely as the square of the distance from the station. suppose

ICE Princess25 [194]

Let I represent intensity and and d the distance;
I $\alpha \frac{1}{ d^{2} }$
When I=8000
8000= $\frac{k}{4}$
k=32000
I= $\frac{32000}{d}$
I= $\frac{32000}{121}$
I=265 units

4 0

3 years ago

Which choice is equivalent to the fraction below? (Hint: Rationalize the denominator and simplify.) I NEED HELP HELP PLEASE PLEA

pishuonlain [190]

Answer:

A sqrt(x+2) - sqrt(x)

Step-by-step explanation:

--------------

sqrt(x) + sqrt(x+2)

Multiply top and bottom by sqrt(x) - sqrt(x+2)

2 sqrt(x) - sqrt(x+2)

------------------------ * --------------------------

sqrt(x) + sqrt(x+2) sqrt(x) - sqrt(x+2)

FOIL the denominator

2 (sqrt(x) - sqrt(x+2))

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sqrt(x^2) - sqrt(x) sqrt(x+2) + sqrt(x) sqrt(x+2) - sqrt(x+2)^2

2 sqrt(x) - 2 sqrt(x+2)

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x - (x+2)

Distribute the minus sign

2 (sqrt(x) - sqrt(x+2))

------------------------------

x - x-2

2 (sqrt(x) - sqrt(x+2))

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-2

Cancel the 2 in the top and bottom

(sqrt(x) - sqrt(x+2))

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-1

Distribute the -1

sqrt(x+2) - sqrt(x)

6 0

3 years ago