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Soloha48 [4]
3 years ago
8

A sphere with a mass of 12 g has a radius measuring 2 cm. What is its density?

Mathematics
2 answers:
wariber [46]3 years ago
7 0
I believe it’s 6 g/cm3. I hope this helps!
quester [9]3 years ago
3 0

Answer:

A.0.36 g/cm^3

Step-by-step explanation:

We are given that

Mass of sphere =12 g

Radius of sphere=2 cm

We have to find the volume of sphere

We know that formula of sphere

Volume of sphere=\frac{4}{3}\pi r^3

Using this formula and substitute the values in the formula

Volume of sphere =\frac{4}{3}\pi (2)^3=\frac{32}{3}\pi cm^3

We know that

Density =\frac{Mass}{volume}

Density =\frac{12}{\frac{32}{3}\pi}

Density=\frac{9}{8\times \frac{22}{7}}

Using\pi=\frac{22}{7}

Density=0.357 g/cm^3

Density=0.36 g/cm^3

Therefore, option A is true.

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Answer: please find the attached files

Step-by-step explanation:

A unit circle formula and special triangle of 45, 30 and 60 degrees can be used to solve the problem.

Please find the attached files for the solution

6 0
4 years ago
The mass of a stone is 5kg. The stone is twice as heavy as a
soldier1979 [14.2K]

Answer:

0.5kg

Step-by-step explanation:

5kg/2=2.5kg

2.5kg/5=0.5kg

4 0
3 years ago
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Suppose $r$ and $s$ are the values of $x$ that satisfy the equation
MaRussiya [10]

Answer:

  -8

Step-by-step explanation:

For roots r and s, the quadratic can be factored ...

  f(x) = (x -r)(x -s) = x^2 -(r+s)x +rs

Then the value of r^2+s^2 can be determined from the coefficient of x (-(r+s)) and the constant (rs) by ...

  r^2 +s^2 = (-(r+s))^2 -2(rs) = (r^2 +2rs +s^2) -2rs = r^2 +s^2

Comparing this to your given equation, we have the coefficient of x as (-2m) and the constant term as (m^2+2m+3). Forming the expression ...

  (x-coefficient)^2 -2(constant term)

we get ...

  r^2 +s^2 = (-2m)^2 -2(m^2 +2m +3) = 2m^2 -4m -6

  r^2 +s^2 = 2(m -1)^2 -8

The minimum value of this quadratic expression is where m=1 and the squared term is zero. That minimum value is -8.

6 0
4 years ago
Mayerlin has a mask collection of 400 masks. She keeps some in a display case and the rest on the wall. She keeps 24% of her mas
mariarad [96]

The number of masks that Mayerlin kept on her wall given the information in the question is 304.

<h3>What are percentages?</h3>

Percentage is the fraction  of an amount that is usually expressed as a number out of hundred. Percentages are a measure of frequency.

<h3>How many masks are on the wall?</h3>

Percentage of the masks on the wall = 100 - 24 = 76%

Number of the masks on the wall = 76% x 400 = 304

To learn more about percentages, please check: brainly.com/question/25764815

4 0
2 years ago
Could someone please help mee
Vladimir [108]

Answer:

8.8 david

13.2 jo

22 mary

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
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