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Vikentia [17]
3 years ago
13

Determine the volume of the pencil

Mathematics
1 answer:
Dafna1 [17]3 years ago
5 0
We have that 
[Volume of the pencil]=[Volume of <span>cylinder]+[volume of cone]
</span>[Volume of cylinder]=pi*(0.5²)*15=11.78 cm³
[volume of cone]=pi*(0.5²)*2/3=0.52 cm³
[Volume of the pencil]=[11.78]+[0.52]=12.30 cm³

the answer is 12.30 cm³
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(¬‿¬) Find the number of real number solutions for the equation. x^2+9x+20=0
mart [117]

To find the nature of solutions of a quadratic equation we can find the discriminant.

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Formula to find the discriminant = b² - 4ac.

So, first step is to compare the given equation with the above equation to get the value of a, b, and c.

After comparing the two equations we will get a =1, b = 9 and c = 20.

Next step is to plug in these value in the formula of discriminant. So,

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Hope this helps you.

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I give brainliest !
gladu [14]

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Solve for A if is 3.14 and R = 3
gavmur [86]

Answer:

A = 28.26

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

Step-by-step explanation:

<u>Step 1: Define</u>

Equation:   A = πr²

Given:   π = 3.14, r = 3

<u>Step 2: Evaluate</u>

  1. Substitute:                    A = 3.14(3)²
  2. Exponents:                   A = 3.14(9)
  3. Multiply:                        A = 28.26
5 0
3 years ago
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