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Shtirlitz [24]
3 years ago
7

The formula for the volume of a sphere is V=4/3πr³, where V is the volume and r is the radius. Solve the formula for r, and then

use it to answer the question.
The volume of a soccer ball is about 371 cubic inches.

What is the radius of the soccer ball, to the nearest tenth of an inch? Use 3.14 for π. Help.

Mathematics
2 answers:
yarga [219]3 years ago
6 0

Answer:

<h2>B.  4.5 in</h2>

Step-by-step explanation:

volume of sphere V = 4/3 π r³

where V = 371 in³

           π = 3.14

find: radius r

solution:

371 =<u> 4 (3.14)</u> r³

         3

simplify:

371 (3) = 4(3.14) r³

<u>371 (3) </u>=  r³

4(3.14)

r³ = <u>  1113   </u>

      12.56

r = \sqrt[3]{88.61}

r = 4.5 in. therefore, the answer is B.

3241004551 [841]3 years ago
5 0

Answer:

4.5 inches to the nearest tenth

Step-by-step explanation:

V=4/3πr^3

Divide both sides by 4/3π:

r^3 =  V / 4/3π

r =  ∛ (V / 4/3 π)

When V = 371 inches:

r =  ∛ (371/ 4/3 π)

= 4.46 in

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Firdavs [7]

We are given :

\sqrt{4x^{2}-20x+25}

Step 1: factor the part inside square root

The function given inside square root is of quadratic form.

So let us try to factorise it using AC method.

Here A*C = 4*25 = 100

so we have to find factors of 100 that add up to give -20.

the two factors are -10 and -10.

Rewriting the function :

4x^{2} -20x+25

=4x^{2} -10x-10x+25

=2x(2x-5) - 5(2x-5)

=(2x-5)^{2}

Step 2:

Now we take square root of the factorised form

\sqrt{(2x-5)^2}

= 2x-5

Answer : (2x-5)

3 0
3 years ago
Hello people who are good at math pls help me. ​
kherson [118]

Answer:

Q1. 12+3×2=N

12+6=N

18=N

Ans: D

Q2. 5+7×2=5+14

=19

Ans: A

Q3. 4-(3-2)+1×(15÷3)=N

4-1+1×5=N

4-1+5=N

8=N

Ans: A

Q4. 48÷(5-1)=N

48÷4=N (last step)

12=N (value of N)

Ans: B

Q5. Ans: D

6 0
2 years ago
Simplify: (a4 - 6a + 5) - (a4 - 3a + 2a2 - 6)
Galina-37 [17]
(a4-6a+5)-(a4-3a+4a-6)
by expressing like term
a4-a4=0
-6a-(-3a+4a)=-5a
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7 0
2 years ago
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Alika [10]

Answer:

x = 1/3

Step-by-step explanation:

f(x) = -3x^2 + 2x-17

This is in the form

ax^2 +bx+c

a = -3  b = 2  c = -17

The axis of symmetry is at

x = -b/2a

x = -2/ (2*-3)

x = -2/-6

x = 1/3

8 0
3 years ago
*BRAIN TEASER*
Mademuasel [1]

Answer:

idk but go dtep by step

Step-by-step explanation:

6 0
3 years ago
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