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n200080 [17]
3 years ago
8

What is the volume of the cone if h=21 units and r=7 units using 3.14 for pie

Mathematics
1 answer:
oksano4ka [1.4K]3 years ago
7 0
You use Volume equation for a cone. Then you plug ur given numbers into that equation.
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Which expression equals a number that is NOT a rational number?
rewona [7]
  • \frac{3\pi.3^3}{7}  is not included as a rational number !

<u>Step-by-step explanation:</u>

Here we have , following expressions & we need to identify which of the following is not a rational number . Let's find out:

We know that , Rational Number : A number which can be expressed in form of p/q , where q is not equal to zero !

Here Expressions are:

  • \frac{3\pi . 3^3}{7\pi}  :

Let's evaluate this expression

⇒ \frac{3(\pi) ( 3^3)}{7(\pi)}

⇒ \frac{3^4}{7}

Therefore , It is a rational number ! .

  • \frac{-18}{5} :

Let's evaluate this expression

⇒ \frac{-18}{5}

Therefore , It is a rational number ! .

  • \frac{5}{3-7-9} :

Let's evaluate this expression

⇒ \frac{5}{3-16}

⇒ \frac{-5}{13}

Therefore , It is a rational number ! .

  • \frac{3\pi.3^3}{7} :

Let's evaluate this expression

⇒ \frac{3\pi.3^3}{7}

⇒ \frac{\pi.3^4}{7}

Therefore , It is not a rational number , as pi is included ! .

4 0
3 years ago
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Let d = 3.
Phoenix [80]
The correct answer would be A.36.

Hope this helps;)
6 0
3 years ago
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Would any one know how to solve this arithmetic series on the number of magic squares created per order. n=order, A=integer, D=d
Svetradugi [14.3K]

Answer:

Step-by-step explanation:

7 0
2 years ago
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An airplane descends 1.8 miles to an elevation of 6.75 miles. Find the elevation of the plane before its descent.
Mariana [72]

Answer: 8.55 miles

Step-by-step explanation:

Adding the totals given in the problem together:

1.8 miles + 6.75 miles = 8.55 miles.

Therefore, because we descended the plane and are looking for the previous height, we just add the descent to the elevation AFTER descent.

3 0
2 years ago
How to solve a verbal problem algebraically
jenyasd209 [6]
Step 1. You must write down/ underline all the numbers given in the problem.

Step2. Identify all the unknown variable such as x, y, a, b [those are the most common ones].

Step 3 Identify what sign of operation your working with... It can be +,-,×,÷.

Step 3 write down all your terms on the LHS of the equation.

Step 4. Equate all the constant on the RHS of the equation. If the constant was negative It would be positive and vic versa

Step. Solve your problem
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