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Ostrovityanka [42]
3 years ago
14

My homework NEED HELP!

Mathematics
1 answer:
ziro4ka [17]3 years ago
8 0

Answer:

the answer will be option A

Step-by-step explanation:

for the volume of a cube , we know,

(side)^3

so, here (2r)^3

= 8r^3

and the volume of a sphere is 4/3πr^3

so for a hemisphere it will be half., then 2/3πr^3

adding these two....we get

8r^3 + 2/3πr^3

= r^3(2/3π+8)

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What is the volume of this cylinder? (Round to the nearest inch ) 7( radius)
Agata [3.3K]

Answer:

The formula for the volume of a cylinder is:

V= pi * radius^2 * height

When the values are plugged in, you would have:

V= pi * 7^2 * 14

Then simplified....

V= pi * 49 * 14

V= pi * 686

V= 2155.13256036

and when rounded to the nearest inch...

the volume would be approximately 2155 inches.

4 0
4 years ago
solve the following problem. mr. grocer has 421 dozen eggs valued at $0.59 per dozen. how much are the eggs worth altogether? 24
pshichka [43]
You have to multiply 421 x .59 which is 248.39



6 0
4 years ago
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Trevor Benjamin is a salesperson who is paid a monthly salary of $500 plus 2% commission on sales. Write an equation that repres
Varvara68 [4.7K]
Let, the amount of sales = x
Then, commission from sale will be: x * 0.02

So, Equation would be:  500 + 0.02x

Hope this helps!
6 0
3 years ago
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Darren is painting a wooden block as part of his art project The block is a rectangular prism that is 12cm long by 9 cm wide by
Ksenya-84 [330]

Answer:

<h3>The surface area in square meters that Darren has to paint is 426cm^2</h3><h3>∴ A=426cm^2</h3>

Step-by-step explanation:

Given that Darren is painting a wooden block is a rectangular prism

Its length is 12 cm ,width is 9 cm and height is 5 cm

<h3>To find the surface area in square meters that Darren has to paint :</h3>

Let l be the length, w be the width and h be the height

Then l=12 cm , w=9 cm and h=5 cm

The formula for the Surface area is

A=2(lw+wh+hl) square units

Substitute the values in formula we get,

A=2(12(9)+9(5)+5(12))

=2(108+45+60)

=2(213)

=426

<h3>∴ A=426cm^2</h3><h3>∴ the surface area in square meters that Darren has to paint is 426cm^2</h3>

5 0
3 years ago
The measure of two supplementary angles are x+10 and 2x-5. Find the values of x and then find the angles
astra-53 [7]

Answer:

  68 1/3, 111 2/3

Step-by-step explanation:

The sum of two supplementary angles is 180°, so ...

  (x +10) +(2x -5) = 180

  3x +5 = 180 . . . . . collect terms

  x +5/3 = 60 . . . . . divide by 3

  x = 58 1/3 . . . . . . . subtract 5/3

The first angle is ...

  x +10 = 58 1/3 +10 = 68 1/3

The second angle is ...

  2x -5 = 2(58 1/3) -5 = 116 2/3 -5 = 111 2/3

The angles measure 68 1/3 and 111 2/3.

6 0
3 years ago
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