Mathematics, 11.06.2021 08:10 tornadowolfcosplay

A small plastic ball has a diameter of 8 centimeters. What is the volume of the ball

Answers: 1

Show answers

Answers

Answer from: kyllow5644

Given:

Diameter of ball = 8 cm

To find:

The volume of the ball.

Solution:

We know that the radius of sphere is half of is diameter.

It is given that the the diameter of ball is 8 cm. So, the radius of the ball is:

$r=\dfrac{8}{2}$

r=4

The radius of the ball is 4 cm.

The volume of a sphere is:

$V=\dfrac{4}{3}\pi r^3$

Where r is the radius of the sphere.

Putting $\pi = 3.14, r=4$ in the above formula, we get

$V=\dfrac{4}{3}(3.14)(4)^3$

$V=\dfrac{4}{3}(3.14)(64)$

V=267.946667

$V\approx 267.95$

Therefore, the volume of the ball is about 267.95.

Answer from: Quest

a. we have two

lines: y = 4-x and

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b. 4-x = 8-x^-1

x 4-x 8-x^-1

-3 7

8.33

-2 6 8.5

-1 5 9

0 4

1 3

2 2

7.5

3 1 7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:

x=-4.236

y = 4-x = 4 – (-4.236)

= 8.236

y = 8-x^-1 = .236)^-1

= 8.236

x=0.236

y = 4-x = 4 – (0.236) = 3.764

y = 8-x^-1 = 8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c. to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x and y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines. the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!

Answer from: Quest

not sure but it may be b, as i said i'm not sure.

Another question on Mathematics

Mathematics, 21.06.2019 13:10

Write a numerical expression that satisfies all of the following conditions. 1.)the only number used in the expression is 5 2.)at least one exponent other than 1 is used 3.)when the expression is evaluated, the answer is greater than 40 and less than 50

Answers: 3

Answer

Mathematics, 21.06.2019 13:30

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Answers: 1

Answer

Mathematics, 21.06.2019 18:10

The means and mean absolute deviations of the individual times of members on two 4x400-meter relay track teams are shown in the table below. means and mean absolute deviations of individual times of members of 4x400-meter relay track teams team a team b mean 59.32 s 59.1 s mean absolute deviation 1.5 s 245 what percent of team b's mean absolute deviation is the difference in the means? 9% 15% 25% 65%

Answers: 2

Answer

Mathematics, 21.06.2019 20:30

Erin bought christmas cards for $2 each to send to her family and friends. which variable is the dependent variable?

Answers: 1

Answer

You know the right answer?

A small plastic ball has a diameter of 8 centimeters. What is the volume of the ball...

Questions

Mathematics, 24.06.2019 04:30

Use identities to find sin2θ and cos2θ, given cosθ= -12/15 and sinθ> 0 plz i need asap giving a lot of points for the one who solves this !...