3 years ago

Which is the correct formula to calculate the volume of a sphere?

1 answer:

3 0

The volume for a sphere is 4/3Pi(r^3), or
4/3 • 3.14 (Pi estimated) • (r • r • r).

Pi is 3.14 estimated, and r is the radius (from a curve to the midpoint of a circle).

I hope this helps!

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Find the value of this expression if x = 5 and y = -1

geniusboy [140]

Answer:

5/6

Step-by-step explanation:

8 0

2 years ago

The width of a rectangle is 80 feet. The length of the rectangle is longer than the width by a distance of feet. Write an algebr

Sauron [17]

Length=width+x
l=w+x (x being the amount of feet longer than the width)

5 0

3 years ago

Read 2 more answers

(−2k 3 −7k 2 +5k)+(6k 2 +3k)=

shusha [124]

Answer: 5k +7

Step-by-step explanation: -2k + -7k + 5k is -4K and 2+3=5 -4K +5 and 6k +3k= 9k + 2 then u do -4K plus 9k and get 5k next, 5+2

7 0

2 years ago

A ladder is leaning against a wall. The top of the ladder is 9 feet (ft) above the ground. If the bottom of the ladder is moved

Komok [63]

Step 1

First situation

when a ladder is leaning against a wall

Let

x-------> the distance of the bottom of the ladder from the wall

L-------> the length of the ladder

Find the length of the ladder

Applying the Pythagorean Theorem

$L^{2} =x^{2}+ 9^{2}$ ------> equation $1$

Step 2

Second situation

when the ladder will be lying flat on the ground

Find the length of the ladder

In this situation the length of the ladder is equal to

$L=x+3$

square both sides

$L^{2}=(x+3)^{2}$ ------> equation $2$

Step 3

equate equation $1$ and equation $2$

$x^{2}+ 9^{2}=(x+3)^{2}\\x^{2}+81=x^{2} +6x+9\\ 6x=81-9\\6x=72\\x=12\ ft$

therefore

the answer is

the length of the ladder is $12\ ft$

see the attached figure to better understand the problem

5 0

3 years ago

a ladder leans against a house making a right triangle with the ground and the wall of the house. The top of the ladder rests on

Dovator [93]

Answer:

Step-by-step explanation:

there ya go

3 0

2 years ago