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
frozen [14]
3 years ago
13

Amanda Elementary School has 4 sixth grade classrooms. If each classroom can hold 30 kids, how many sixth graders can they hold

in all?
Mathematics
2 answers:
Diano4ka-milaya [45]3 years ago
7 0

Answer: There are 120 sixth graders.

Step-by-step explanation.

Just multiply 30 times 4

Lilit [14]3 years ago
6 0

Answer:

I'm not sure what you're trying to ask. Is there a total number of kids?

You might be interested in
I need help finding both volume and surface area
Svetradugi [14.3K]

Answer:

<u>Volume</u>

For the rectangle, h = 3cm, l = 8cm, w = 6cm
V = length x width x height
V = 8cm x 6cm x 3cm
V = 144cm^3

For the semi circle, we need to find the radius. The radius is width/2, so 6cm/2 = 3cm. r = 3cm, \pi = 3.14
V = radius^2 x height x \pi
V = 3cm^2 x 3cm x 3.14
V = 84.8 cm^3/2 (because the cylinder needs to be divided to form a semi-circle)
V= 42.4cm^3 (there are two cylinders though so we will multiply this by 2 in the total volume)

Total volume:
V = 144cm^3 + 42.4cm^3(2)
V = 186.4cm^3

<u>Surface Area</u>

Rectangular prism:
A = 2[w(l) + h(l) + h(w)]
A = 2[6cm(8cm) + 3cm(8cm) + 3cm(6cm)]
A = 180cm^2
But there are two sides that are covered by the semi-circular prisms, so we will have to calculate those sides and remove them.
A = l x w
A = 6cm x 3cm
A = 18cm^2(2) (2 being the two faces)
A = 36cm^2

A = 180cm^2 - 36cm^2
A = 144cm^2 (the area of the rectangle)

Semi-circular prism:
A = 2\pirh + 2\pir^2
Earlier, we found out that the radius of the circle is 3cm, so we will plug that in.
A = 2(3.14)(3cm)(3cm) + 2(3.14)(3cm)^2
A = 113.09cm^2

Total surface area:
A = 144cm^2 + 133.09cm^2
A = 277.09cm^2

Therefore the total volume of the prism is 186.4cm^3 and the total surface area is 277.09cm^2.





6 0
2 years ago
Identify the rule for fg when f(x) = –3x – 6 and g(x) = x2 – x – 6.
stellarik [79]

Answer:

f(g) = -3( x^2 -x-6) -6 = -3x^2+3x+12

4 0
3 years ago
Find the minimum value of
Lana71 [14]

Answer:

14

Step-by-step explanation:

2x + y = 20                                                                                     (1)

2x + 3y = 36                                                                                  (2)

(2) - (1) ⇔ (2x - 3y) - (2x + y) = 36 - 20

          ⇔ 2y = 16

          ⇔ y = 8                                                                               (3)

From (3) and (1), we have:

    2x + y = 2x + 8 = 20

⇔ 2x = 12

⇔ x = 6

So: C = x + y = 6 + 8 = 14

Conclusion : C = 14

Brainliest, please?

4 0
3 years ago
Please help math !!!!!!
Andrews [41]
I think it’s the second choice
3 0
3 years ago
Read 2 more answers
Three balls are packaged in a cylindrical container as shown below. The balls just touch the top, bottom, and sides of the cylin
lianna [129]
We know the following:
Cylinder volume: V₁ = π r² h
Ball (sphere) volume:V₂ = \frac{4}{3} π r³
where:
V - volume
r - radius of base of cylinder and diameter of ball
h - height of cylinder.

R = 13 cm ⇒ r = 13 ÷ 2 = 6.5
π = 3.14

a) Since balls touch all sides of cylinder (as shown in image), it can be concluded that height of cylinder is equal to sum of diameters of 3 balls and that radius of base of cylinder is equal to radius of ball:
h = 3 × r = 3 × 13 cm = 39 cm
r = 6.5 cm
So,
V₁ = <span>π r² h
</span><span>V₁ = </span>3.14 × (6.5 cm)² × 39 cm
V₁ = 5,173.9 cm³

b. The total volume of three balls is the sum of volumes of each ball:
Vₐ = 3 × <span>V₂ 
</span>Vₐ = 3 × <span>\frac{4}{3} π r³
</span>Vₐ = 3 × \frac{4}{3} 3.14<span> (6.5 cm)³</span>
Vₐ = 3,449.3 cm³

c. Percentage of the volume of the container occupied by three balls ould be expressed as ratio of volume of three balls and volume of cylinder:
V = \frac{ V_{1}}{ V_{a} } ×100 
V = \frac{3,449.3}{5,173.9} ×100
V = 0.6666 ×100
V = 66.66%
4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the equation of the horizontal line that contains the point (-3,8)? Please show work
    11·1 answer
  • What is the answer -x -13 = 35
    12·2 answers
  • Factor this plzzzzzzzzzzz . <br> 4a2–b2–2a+b
    14·1 answer
  • is it possible to solve the system {3x-2y=10][ x+2y=6} by using substitution? if so,explain how.which method substitution or eli
    8·1 answer
  • What is the value of X in the figure<br> X=...
    14·2 answers
  • 1/4 of a pipe is white , 1/2 part of the remaining is blue. If the remaining part is black and the length of this black part is
    13·1 answer
  • Need help ASAP
    6·1 answer
  • Which number line represents the solution of 4x - 9 &gt; - 21?
    10·1 answer
  • 77x10= what 10 x77 77x10
    11·1 answer
  • the space station has an average orbit of 250 miles above the earth. how many pennies would it take to make a stack that high? p
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!