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krok68 [10]
3 years ago
9

PLEASEEE HELP I WILL MARK YOU BRAINIEST!!!

Mathematics
1 answer:
lisabon 2012 [21]3 years ago
7 0

Answer:

26

Step-by-step explanation:

duh....

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Somebody please help! Marked Brainliest!
olga nikolaevna [1]

Answer:

Part A:

The surface area of a cylinder is given by

A=  6πr² if h= 2r

Part B:

Total Cost of covering the cylinder = Rate *2πrh + rate*2πr²

Cost of covering only the side = Rate *2πrh

Step-by-step explanation:

Part A:

The surface area of a cylinder is given by

A= 2πrh + 2πr²

Where h= height and radius = r

But we have the height twice as radius so h= 2r

So putting h= 2r we get

A= 2πr(2r) + 2πr²

A= 4πr² + 2πr²= 2πr²(2+1) = 2πr²(3)= 6πr²

Part B:

Cost = Rate * area of the wall + rate * area of the top and bottom

Cost = Rate *2πrh + rate*2πr²

Where area of the top and bottom= πr² +πr² =2 πr²

and area of the side = 2πrh

Multiplying both with the rate and then adding would give the total cost of materials needed to cover the outside of the cylinder and from top and bottom as well.

If  you do not need to cover top and bottom then the expression would be

Cost of covering only the side = Rate *2πrh

Part C:

Already done above.

4 0
3 years ago
A plane loses altitude at the rate of 5 meters per second. It begins with an altitude of
Katarina [22]

Answer:

ffhdfhfgfghgfhg

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
A gardener is planting two types of trees:Type A is three feet tall and grows at a rate of 15 inches per year.Type B is four fee
Sliva [168]
First, construct two equations.
Then, equal the two equations to each other like this -

x will be the years.

Type A. Type B

3x + 15 = 4x + 10
- 15. - 15

3x = 4x - 5
-4x. -4x

-x = -5
-x/-1 = -5/-1
x = 5

Check:

3(5) + 15 = 4(5) + 10
15 + 15 = 20 + 10
30 = 30

Therefore, the trees will be the same height in 5 years.
7 0
3 years ago
Which rational functions have an oblique asymptote? Check all that apply. f(x) = x^2+1/x f(x)= 4x^2-6/x+1 f(x)=-x/x^2 f(x)=x^5/x
Nata [24]

Answer:

he1jjdj2jfjxuzwyehhgjcucahhehfj2j2ii281ieb3bbzb,$,×^*$**》 up 7dogs 7in 7a is the sus and the imposter and the other producers of the day dear zamku

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3 years ago
Belle operates a
olganol [36]
The correct answer would most likely be 0.75n - 0.18n
8 0
3 years ago
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