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alexira [117]
4 years ago
11

What is the volume of a cone that has a height of 7 mm and a radius of 3 mm?

Mathematics
1 answer:
MakcuM [25]4 years ago
6 0
<span>The formula for the volume of a cone is (1/3)*area of the base * height. The base is a circle, whose area is pi times radius^2. Here this is pi * (r^2) = 3.14*(3mm)^2 = 28.26 mm^2. And so the volume is (1/3) * 28.26 mm^2 * 7mm = 65.94 mm^3. I recommend that you find the most common formulas of the geometrical figures and make a flashcard that you can use at any moment.</span>
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Correct
____ [38]
  • Answer:

<em>v₂ = 55mph</em>

  • Step-by-step explanation:

<em>Hi there ! </em>

<em>Velocity formula</em>

<em>v = distance/time = d/t => d = vₓt</em>

<em>v₁ = v₂ - 11</em>

<em>t₁ = 10h</em>

<em>t₂ = 8h</em>

<em>d = v₁ₓt₁ = (v₂ - 11)t₁ </em>

<em>d = v₂t₂</em>

<em>(v₂ - 11)t₁ = v₂t₂</em>

<em>replace t₁ ; t₂</em>

<em>(v₂ - 11)10 = v₂8</em>

<em>10v₂ - 11ₓ10 = 8v₂</em>

<em>10v₂ - 8v₂ = 110</em>

<em>2v₂ = 110</em>

<em>v₂ = 55 mph</em>

<em>Good luck !</em>

3 0
3 years ago
The sum of 3 times a number and 4 is between -8 and 10. Define a variable, write an inequality, and solve the problem.
hoa [83]

let the number be x

-8<3x+4<10

-12<3x<10

-4<x<10/3

5 0
4 years ago
Help pleasee!
victus00 [196]

Answer:

  1. Corresponding Angle Postulate
  2. Corresponding Angle Postulate
  3. Reflexive Property
  4. Similar

Step-by-step explanation:

The pairs of angles referenced in statements 1 and 2 are "corresponding" angles, so the Corresponding Angle Postulate applies.

The Reflexive Property is what says something is the same as itself. This is used in statement 3.

The upshot of the AA Similarity postulate is to say triangles are similar (as in statement 4).

7 0
2 years ago
A grocery sold 5kg of wheat flour at Rs30 per kg and gained 20%. If he had sold it at Rs27 per kg, what would be his gain or los
maria [59]

Answer:

His gain percent would have been 8%

Step-by-step explanation:

The key to answering this question is to first calculate the price at which the wheat flour was bought.

Mathematically;

% profit = (selling price-cost price)/cost price * 100%

Let the cost price be $x

Thus;

% profit = (30-x)/x * 100

20 = 100(30-x)/x

20x = 3000-100x

100x + 20x = 3000

120x = 3000

x = 3000/120

x = Rs 25

So let’s assume he sold at Rs 27

His profit would have been 27-25 = 2

His gain or loss percentage would’ve been;

2/25 * 100/1 = 200/25 = 8% (gain, since selling price is greater than the cost price)

3 0
3 years ago
The final balance in an account that has a monthly fee and automatic monthly deposits is given by the expression. The initial ac
trapecia [35]
150x represents the monthly deposit, and -4.99 represents the monthly fee.
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4 years ago
Read 2 more answers
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