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Harman [31]
4 years ago
10

A cone-shaped building has a height of 11.4 meters and a base with a diameter of 12 meters. The building will be filled with roa

d salt that costs $20 per cubic meter.
How much will it cost to fill the building with road salt?
Use 3.14 for π.
Mathematics
2 answers:
egoroff_w [7]4 years ago
5 0

Answer:

The actual answer is 8591.04

Step-by-step explanation:

I'm in K12 and it said that 8591.04 is the right answer

Lyrx [107]4 years ago
3 0
We know, Volume of a Cone = πr² h/3
v = 3.14 * (6)² * 11.4/3
v = 3.14 * 36 * 3.8
v = 429.552

Now, for 1 m³, it costs = $20
So, for 429.552 m³, it will be: 20 * 429.552 = 8591

In short, Your Answer would be $8591

Hope this helps!
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Help meeeeeeeeeeeeeeee pleaseee!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
konstantin123 [22]

For the equation  F(x) = ax² + bx + c we have:

  • maximum value if a<0
  • minimum value if a>0

F(x) = -3x² + 18x + 3    ⇒  a = -3, b = 18

a < 0    ⇒   the function has a maximum value

Quadratic function has the maximum value (or minimum) at vertex of its parabola.

The maximum value is k at x=h where:  h=\dfrac{-b}{2a}  and  k = F(h)

h=\dfrac{-18}{2\cdot(-3)}=3\\\\F(3)=-3\cdot3^2+18\cdot3+3=-27+54+3=30

Therefore:

<h3> The function has a maximum value of 30 at x = 3</h3>

3 0
2 years ago
1.When two variables are proportional which of the following is constant?
grin007 [14]

Answer:

Their Ratio

Step-by-step explanation:

You switched the numbers 2 and 3 btw

5 0
3 years ago
If 3 oranges and 4 apples cost $14 and 5 oranges and 2 apple cost $21. find the value of 2 oranges and 3 apples.
Semmy [17]

Answer:

$18

Step-by-step explanation:

3 0
3 years ago
Describe the error in the work shown.
mihalych1998 [28]

The error was in second step.

3√(y^3)^4 = y^4

(Cube root cancels cube and not power 4)

The answer should be:

xy^4/4

//Hope it helps.

4 0
3 years ago
Equation M: y = 3x + 4
solmaris [256]
Y = 3x + 4
y = 3x + 7

3x + 4 = 3x + 7
3x - 3x = 7 - 4
0 = 3.....incorrect....this system has no solutions because ur lines are parallel and they never cross.

or look at it this way..
y = 3x + 4
y = 3x + 7

both have slopes of 3...but the y intercepts are different......when this happens, it means the lines are parallel with no solution
4 0
3 years ago
Read 2 more answers
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