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Alex73 [517]
3 years ago
8

Help please find the volume of the sphere

Mathematics
1 answer:
borishaifa [10]3 years ago
4 0

Answer: 44.6cm³

The formula is \frac{4}{3} \pi r^3.

Since the formula had π (pi) pi is 3.14.

The radius is the line inside the sphere.

That being said, the radius is 2.2, so the line is 2.2 long.

Now, let's solve.

4/3 × 3.14 = 4.186 → 4.19

4.19 × 2.2³ = 44.6

Hence, 44.6 is the answer.

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If the scale factor between two circles is 2x/5y, what is the ratio of their areas?​
Zinaida [17]

Given that the <em>length</em> ratio between the radii of the two circles is (2 · x) / (5 · y). The ratio of the areas of the two circles is (4 · x²) / (25 · y²).

<h3>What is the area ratio of two circles?</h3>

According to the statement we know that the radius ratio between two circles. Given that the area of the circle is directly proportional to the square of its radius, then the <em>area</em> ratio is shown below:

A ∝ r²

A = k · r²

A' · r² = A · r'²

A' / A = r'² / r²

A' / A = (r' / r)²

A' / A = [(2 · x) / (5 · y)]²

A' / A = (4 · x²) / (25 · y²)

Given that the <em>length</em> ratio between the radii of the two circles is (2 · x) / (5 · y). The ratio of the areas of the two circles is (4 · x²) / (25 · y²).

To learn more on ratios: brainly.com/question/13419413

#SPJ1

7 0
2 years ago
Solve for x: 3x - 4 = 23<br><br> Answer: x =
krok68 [10]

Answer:x=9

Step-by-step explanation:

3(9)=27

27-4=23

4 0
3 years ago
Read 2 more answers
3 6/4 in simplest form
ivanzaharov [21]

Answer:

4 1/2.

hope this helps!

6 0
3 years ago
In studying the insurance preferences of homeowners the following conclusions are made: A homeowner is three times as likely to
Ede4ka [16]

Answer:

0.632

Step-by-step explanation:

Given that a homeowner is three times as likely to purchase additional jewelry coverage as additional electronics coverage

If probability of purchasing additional electronics coverage = p, then prob of purchasing jewelry coverage = 3p

The two events are independent hence joint probability is product of these two.

i.e. P(both) = p(3p) =3p^2

This is given as 0.2

3p^2 =0.2\\p = 0.258

the probability that a homeowner purchases exactly one coverage.

=P(AUB)-P(A \bigcap B)

= Prob he purchases I + prob he purchases II-2(prob he purchases both)

= 0.258+3(0.258)-2(0.2)\\=0.632

5 0
3 years ago
The difference of a number and 8 is the same as 34 less the number. find the number.
Dovator [93]
Let the number be x.

8 - x = x -34

2x = 8 + 34

2x = 42

x = 21

Answer: The number is 21.
4 0
3 years ago
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