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Virty [35]
3 years ago
10

30 POINTS NEED HELP ASAP WILL MARK BRAINLY

Mathematics
1 answer:
padilas [110]3 years ago
5 0

Answer:

Step-by-step explanation:

the 3rd one

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15) The diameter of a cylinder is 12 and height is 11. Find the surface area of the figure. ​
kirza4 [7]

Answer:

A=640.88

Step-by-step explanation:

if the diameter is 12, the radius , r=12/2=6

we have r=6, h=11

Surface area, A= 2πrh+2π r^2

A=2*3.14*6*11+2*3.14*(6)^2=640.88

7 0
3 years ago
A circle has a diameter of 9cm
Katen [24]

For the square to fit inside the circle without touching it, the diagonal of the square needs to be less than the diameter of the circle.

Using the Pythagorean theorem we can calculate the diagonal of the square:

X = SQRT(5^2 + 5^2)

X = SQRT(25 + 25)

X = SQRT(50)

X = 7.07

The diagonal of the square is 7.07 cm, which is less than the diameter of the circle, 9cm, so it will fit .

8 0
3 years ago
the height of burj Dubai, the tallest building in the world (2013), has a total of 162 stories. if the building is 828 meters ta
timama [110]
Divide: 828÷162
Equals about 5 meters per story
3 0
3 years ago
Read 2 more answers
What's the circumference of a<br> circle with a diameter of 9 inches?<br> Use 3.14 for n.
Rainbow [258]

Answer:

28.26 in

Step-by-step explanation:

Radius = (1/2) diameter

Radius = (1/2)(9)

Radius = 4.5 in

Circumference = 2πr

Circumference = 2(3.14)(4.5)

Circumference = 28.26 in

8 0
3 years ago
20 points<br> How on Earth am I supposed to do this
goblinko [34]

Answer: -89

Step-by-step explanation:

So your equation is

- 9(a) - 7(x) - 9(c) - 9(b) - 7(y)

You know that (a) (b) and (c) = -1

You also know that (x) and (y) = 7

So, when you put this into the equation, it will look like this:

- 9(-1) - 7(7) - 9(-1) - 9(-1) - 7(7)

When you work that out you will get left with your answer, which is -89.

HOPE THIS HELPS!!!

3 0
3 years ago
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