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
Vlad1618 [11]
2 years ago
8

PLEASE HELP!

Mathematics
1 answer:
IrinaVladis [17]2 years ago
3 0

Answer:

Step-by-step explanation:

<h3>Sphere:</h3>

1) a) r =  7 cm

 \sf \boxed{\text{Volume of sphere=$\dfrac{4}{3}\pi r^3$}}

                             \sf =\dfrac{4}{3}*3.14*7*7*7\\\\= 1436 \ cm^3

 \sf \boxed{\text{\bf Surface area of sphere = $4\pi r^2$}}

                                           = 4*3.14 * 7 * 7

                                           = 615.44 cm²

b) r= 8.4 cm

     Volume = \dfrac{4}{3}\pi r^3

                  \sf =\dfrac{4}{3}*\dfrac{22}{7}*8.4*8.4*8.4\\\\= 2483.7 \ cm^3

   Surface area = 4*3.14*8.4*8.4

                         = 887.04 cm²

<h3>Hemisphere:</h3>

      a) r = 6 cm

     \sf \boxed{\text{\bf Volume of hemisphere =$\dfrac{2}{3} \pi r^3$}}

                                                \sf =\dfrac{2}{3}*3.14*6*6*6\\\\= 452.16 \ cm^3

        \sf \boxed{\text{\bf Surface area of hemisphere=3 \pi r^2}}\sf \boxed{\text{\bf Surface area of hemisphere = $3 \pi r^2$}}

                                                            = 3 * 3.14 * 6 * 6

                                                             = 339.12 cm²

                                                           

                       

You might be interested in
Find the solution Y=-3x-5 y=9x+7 and show on graph
slava [35]

Answer:

(-1, -2)

Explanation:

5 0
2 years ago
Please take your time.​
Liula [17]

Answer:

4

Step-by-step explanation:

12+8 = 20

20/5 = 4

5 0
3 years ago
Read 2 more answers
5*10 divided by 30 -10
sp2606 [1]
The answer to your question would be -25/3

As decimal -8.333333
4 0
2 years ago
You observe the heights of two plants for an experiment. Plant A has a height of 8 centimeters and grows 1 centimeter each week.
saveliy_v [14]

Answer:

69

Step-by-step explanation:

8 0
3 years ago
What is three more than the product of a number and 7 equals 8 . use the variable x for the unknown number?
Anastaziya [24]
(7x) + 3 = 8
subtract both sides by 3.

7x = 5
divide both sides by 7 to isolate the variable, x.

x = 5/7
7 0
3 years ago
Other questions:
  • Solve the following systems of equations:<br> 4x+5y=-4<br> 4x+3y=12<br><br> X=?<br> Y=?
    11·2 answers
  • Find the coordinates of the other endpoint of the segment, given its midpoint and one endpoint. (Hint: Let (x,y) be the unknown
    6·1 answer
  • What’s #27 in vertex form
    13·2 answers
  • a sphere has a radius of 3x+2. which polynomial in standard form. best describes the total surface area of the sphere
    12·1 answer
  • Plz help I'm halfway through the lesson​
    6·2 answers
  • A recipe for ricotta cheese calls for 3/4 cup of whole milk for every 1/8 teaspoon of salt how much whole milk should be used fo
    11·1 answer
  • The animal shelter needs to split 6 1/2 pounds of dog food equally among the 13 dogs in the facility. How much dog food will eac
    6·2 answers
  • For the function y = -2x + 20, what is the output when the input is 50.
    13·1 answer
  • Use the graph of the polynomial function to find the factored form of the
    13·2 answers
  • Please help!!!! find the slope with the qord band above ! show me the work please !!​
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!