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3 years ago

Find the volume of the cone. Either enter an exact answer in terms of pi or use 3.14 for pi

Mathematics

2 answers:

Amanda [17]3 years ago

3 0

Answer:

Volume is 20.93333333 units^3

Step-by-step explanation:

I used 3.14 for pi

Look at the attachment

Alla [95]3 years ago

3 0

Answer:

6 2/3pi

Step-by-step explanation:

formula is 1/3 x pi x r x r x h

thus 1/3 x pi x 2 x 2 x 5 =6 2/3pi

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9 + b = -12<br> q+ (-9) = 12

sertanlavr [38]

Subtract 9 from both sides

b = -12 - 9

simplify -12 - 9

Answer: b = -21

9 + -21 = -12 is true.

simplify brackets

simplify q + -9 to q - 9

add 9 to both sides

simplify 12 + 9 to 21

q = 21

21 + -9 = 12 is true.

4 0

3 years ago

Need help on this question ASAP.

chubhunter [2.5K]

I think its b that what it looks like to me
i hope this helps

8 0

4 years ago

The total cost of 4 starfish was $7.20. Write and solve an equation to find how much one starfish cost.

Lyrx [107]

Answer:

$1.80

Step-by-step explanation:

4x = 7.20

x = 1.80

7 0

3 years ago

1. The sum of the angles is 90° The difference between twice the larger angle and the smaller

Ostrovityanka [42]

Answer:

$\displaystyle 25°\:and\:°65$

Step-by-step explanation:

{90° = m∠1 + m∠2

{105° = 2m∠1 - m∠2

_______________

$\displaystyle \frac{195°}{3} = \frac{3m∠1}{3} \\ \\ 65° = m∠1$

All you have left to do is this:

$\displaystyle 25° = -65° + 90°$

So, your two angle measures are $\displaystyle 25°\:and\:°65.$

I am joyous to assist you anytime.

5 0

3 years ago

16. Let W be the set of all vectors in R3 of the form a+2b b -3a Find a basis for Wand state the dimension of W.

Yuki888 [10]

Answer:

$W=\{\left[\begin{array}{ccc}a+2b\\b\\-3a\end{array}\right]: a,b\in\mathbb{R} \}$

Observe that if the vector $x=\left[\begin{array}{ccc}x\\y\\z\end{array}\right]$ is in W then it satisfies:

$\left[\begin{array}{ccc}x\\y\\z\end{array}\right]=\left[\begin{array}{c}a+2b\\b\\-3a\end{array}\right]=a\left[\begin{array}{c}1\\0\\-3\end{array}\right]+b\left[\begin{array}{c}2\\1\\0\end{array}\right]$

This means that each vector in W can be expressed as a linear combination of the vectors $\left[\begin{array}{c}1\\0\\-3\end{array}\right], \left[\begin{array}{c}2\\1\\0\end{array}\right]$

Also we can see that those vectors are linear independent. Then the set

$\{\left[\begin{array}{c}1\\0\\-3\end{array}\right], \left[\begin{array}{c}2\\1\\0\end{array}\right]\}$ is a basis for W and the dimension of W is 2.

7 0

3 years ago