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3 years ago

15

A sphere has a diameter of 6 ft. Find the volume of the sphere. some help please

2 answers:

DerKrebs [107]3 years ago

5 0

The Diameter should be 2r hopefully this is right.

Serga [27]3 years ago

5 0

Answer:

exact = 36pi , rounded = 113.097

Step-by-step explanation:

The volume of a sphere is 4/3*pi*r^3

a radius is half of a diameter, so the radius is 3 ft.

4/3*pi*3^3

3 cubed equals 3*3*3 which equals 27.

so, now you get 4/3*pi*27

so you get approximately 113.097, or 36pi

Hope this helps!

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Solve (u + 10) ^ (4/3) = 4 where u is a real

Strike441 [17]

Answer:

-7.17

Step-by-step explanation:

${(u + 10)}^{ \frac{4}{3} } = 4 \\ \\ u + 10 = {4}^{ \frac{3}{4} } \\ \\ u + 10 = ( {2}^{2} )^{ \frac{3}{4} } \\ \\ u + 10 = {2}^{2 \times \frac{3}{4} } \\ \\ u + 10 = {2}^{ \frac{3}{2} } \\ \\ u + 10 = {8}^{ \frac{1}{2} } \\ \\ u + 10 = \sqrt{8} \\ \\ u + 10 = 2.82842712 \\ \\ u = 2.82842712 - 10 \\ \\ u = -7.17157288 \\ \\ u \approx-7.17$

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3 years ago

3x+3/2=x/2-6 maths chapter

LekaFEV [45]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

How is the sentence "4 more than q is -4" written as an equation?

MariettaO [177]

Answer:

<h2>q+4= -4</h2>

Step-by-step explanation:

step one:

This problem is based on a word problem, in word problem basically we are expected to convert statements to mathematical expression.

given the statement as

"4 more than q is -4"

step two:

1. 4 more than q is expressed as q+4

2. is -1 simply tells us that no 1 above is equal to -4

step three:

hence the statement written mathematicaly is

q+4= -4

8 0

3 years ago

What are the solutions of the equation x4+3x2+2=0? use u substitution to solve

sweet [91]

Answer: x = ± i , x = ±√2i are solution .

Step-by-step explanation:

Given : $x^{4} +3x^{2} +2=0$ , use u substitution to solve.

To find : what are the solutions of the equation .

Solution : We have given that $x^{4} +3x^{2} +2=0$ .

Let consider $x^{2}$ = u .

Substitute u = $x^{2}$ in given equation .

$u^{2} + 3u +2=0$ .

On factoring

$u^{2} + 2u+1u +2=0$ .

Taking common

u( u+2) +1 (u+2) = 0.

On grouping

(u+1) (u+2) =0

Now, u+1 = 0 ⇒ u = -1.

u+2 = 0 ⇒ u = -2.

In term of x, plugging $x^{2}$ = u.

$x^{2}$ = -1 ; $x^{2}$ = -2.

taking square root both side

x = ± i

x = ±√2i.

Therefore, x = ± i , x = ±√2i are solution .

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4 years ago

G=b(a + D2)<br><br> Solve for A

Katyanochek1 [597]

Answer:

$a = \frac{g}{b} - D_{2}$

Step-by-step explanation:

Given the literal equation, $g = b(a + D_{2})$

To solve for a:

Multiply both sides of the equation by $\frac{1}{b}$ :

$(\frac{1}{b}) g = (\frac{1}{b}) b (a + D_{2})$

$\frac{g}{b} = a + D_{2}$

Next, subtract $D_{2}$ on both sides of the equation to solve for a:

$\frac{g}{b} - D_{2} = a + D_{2} - D_{2}$

$\frac{g}{b} - D_{2} = a$

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3 years ago