1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
lorasvet [3.4K]
2 years ago
8

Need help with this fast

Mathematics
2 answers:
kramer2 years ago
8 0

Answer:

<u>C</u>

Step-by-step explanation:

Formula for the volume of a cone :

<u>Volume (cone) = 1/3πr²h</u>

<u />

===========================================================

Given :

⇒ r = 4 units

⇒ h = 21 units

============================================================

Solving :

⇒ Volume (cone) = 1/3 × π × (4)² × 21

⇒ Volume (cone) = 16 × 7 × π

⇒ Volume (cone) = <u>112π units²</u>

disa [49]2 years ago
4 0

Answer:

\sf C. \quad 112 \pi \:units^2

Step-by-step explanation:

\textsf{Volume of a cone}=\sf \dfrac{1}{3} \pi r^2 h \quad\textsf{(where r is the radius and h is the height)}

Given:

  • radius = 4 units
  • height = 21 units

Substituting the given values into the formula:

\implies \sf Volume=\dfrac{1}{3} \cdot \pi \cdot 4^2 \cdot 21

\implies \sf Volume=112 \pi \:units^2

You might be interested in
Find the area of circle Y. The image is represented by circle Y with a sector XYZ that has an area of 85.5 square meters. That s
pochemuha

Answer:

  263.08 m²

Step-by-step explanation:

The fraction of circle area that a sector represents is proportional to the central angle.

<h3>Proportion</h3>

  circle area/circle angle = sector area/sector angle

  circle area / 360° = 85.5 m² / 117°

Multiplying by 360°, we have ...

  circle area = (360/117)(85.5 m²) = 263.08 m²

The area of the circle is about 263.08 m².

6 0
1 year ago
Give a girl gave me head would I get any disease
stiks02 [169]

Answer:

No, but you could give her a disease. You should get tested before any type of sexual interaction

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Which situation represents a proportional relationship?​
ozzi

Answer:

c.... i am just smart

5 0
3 years ago
Help me please urgent
asambeis [7]

Let \:  x  \: be  \: the \:  number \:  of \:  hours \\ Expession: - 4.5x =  - 27\Leftrightarrow x =  \frac{ - 27}{ - 4.5}  = 6 \: hours

7 0
3 years ago
Se golpea (chuta) un balón sobre el piso y sale dando botes parabólicos cada vez menores. Si se lanzo inicialmente con una veloc
Ipatiy [6.2K]

Answer:

a)d = 180,91 m

b)t = 11,76 seg

Step-by-step explanation:

Para el lanzamiento de proyectil, la ecuación que nos da la velocidad en V(y) es:

V(y)  = Voy - g*t

en donde Voy = Vo * senα    ( donde Vo es la velocidad inicial, α el angulo del disparo.

Si en esta ecuación hacemos V(y) = 0 estamos en el punto donde el componente en el eje y de la velocidad del proyectil es cero, ese punto es el punto medio del recorrido.

0 =  Vo*sen 60⁰     - g*t

g*t  =  Vo* √3/2

t  = { 32 [m/s] * √3 }2*9,8 [m/s²]

t = 16*√3  / 9,8

t = 2,8278 seg

El tiempo total del primer recorrido es entonces por simetría

t₁ = 2 * 2,8278           t₁  = 5,6556 seg

La distancia del primer impacto al suelo es:

x = Vox * t₁                        ( Vox es constante   Vx = Vo*cos 60⁰ )

x  =  32 * (1/2) * 5,6556

x₁  =  90,49 m

Aplicando los mismos criterios ahora para el segundo bote

Ahora Vo = 32 -  32*(1/4)

V = 24 m/s

g*t  =  24 * sen 50⁰

t =  24* 0,7660/ 9,8  

t =  1,8759

2*t  = 2*1,8759

t₂  = 3,7518 seg

x₂  =  Vox * t₂

x₂  =  24* 0,6428*3,7518

x₂  =  57,88 m

Y para el tercer bote Vo =  24 - 24(1/4)        Vo = 18 m/s     α = 40⁰

t = 18 *0,6428/9,8

t  = 1,18

2t  = t₃  = 2*1,18

t₃ = 2,36 seg

x₃  = Vox * 2,36                Vox = Vo*cos 40      Vox = 18*0,7660  

Vox = 13,79

x₃  = 13,79*2,36

x₃  = 32,54 m

La distancia total será

d = x₁  + x₂ + x₃

d  =  90,49  + 57,88 + 32,54

d = 180,91 m

y el tiempo total será la suma de los tiempos

t =  t₁  +  t₂  +  t₃

t  = 5,65 + 3,75 + 2,36

t = 11,76 seg

8 0
3 years ago
Other questions:
  • A triangle has a base 9cm and a perpendicular height 4.7 cm. work out the area of the triangle​
    11·2 answers
  • What is the discriminant of the equation?
    6·1 answer
  • In math is. about 20 miles per hour add or subtract
    7·2 answers
  • -2(4n-6)=22 what is n?
    5·2 answers
  • Find inverse function of y= (1/x) +1
    11·1 answer
  • 6th grade math help me pleaseeee
    11·2 answers
  • (4u + 9) + 9u^2<br><br> adding &amp; subtracting polynomials
    9·2 answers
  • Please help by Friday !!
    5·2 answers
  • If a Canada savings Bond is worth $6225 after 7 years, and was originally bought for $5000, what was the annual simple interest
    8·1 answer
  • Plase help I need it​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!