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3 years ago

1/3 to the power of negative 2

Mathematics

1 answer:

andrew11 [14]3 years ago

3 0

Answer:

Step-by-step explanation:

1/3 if we multiply it with it self we will get this answer

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Find the value of each of the following.Increase 60 by 35 percent

daser333 [38]

Answer:

the new value is 81.

Step-by-step explanation:

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2 years ago

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Find a.b. a=3i+2j-k, b=4i+5k

Tomtit [17]

Answer: $a\cdot b= 7$

Step-by-step explanation:

We are given

$a=3\hat{i}+2\hat{j}-\hat{k}$

$b=4\hat{i}+5\hat{k}$

They can be written as

$a=3\hat{i}+2\hat{j}+(-1)\hat{k}$

$b=4\hat{i}+0.\hat{j}+5\hat{k}$

Now , the dot product of and b is given by :-

$\Rightarrow\ a\cdot b= (3\hat{i}+2\hat{j}+(-1)\hat{k})\cdot(4\hat{i}+0.\hat{j}+5\hat{k})$

$\Rightarrow\ a\cdot b=3\cdot 4 \cdot\hat{i}\cdot\hat{i}+2\cdot0\cdot\hat{j} \cdot\hat{j}+ (-1)\cdot 5 \cdot \hat{k}\cdot \hat{k}$

$\Rightarrow\ a\cdot b=12 \cdot\hat{i}^2+0-5 \cdot \hat{k}^2$

$\Rightarrow\ a\cdot b=12 \cdot(1)+0-5 \cdot (1)$ [Since $\hat{i}^2=\hat{k}^2=1$ ]

$\Rightarrow\ a\cdot b=12 -5=7$

Therefore , the value of the dot product $a\cdot b= 7$

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3 years ago

The number of eagles observed along a certain river per day over a two week period is listed below. What is a frequency table th

SpyIntel [72]

The frequency table is the table with the number of times every value appears:

So, this is the frequency table:

Number of eagles Numer of times that number appears

0 1

2    1

3    1

4    0

5    1

6    0

7 1

8 1

9 1

10 1

11    0

12 1

13 1

14 0

15 1

16 0

17 0

18 1

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3 years ago

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State whether set A and B are equal, equivalent, both, or neither. <br> A = {9, 8, 7} B = {8, 9, 10}

bearhunter [10]

They're just equivalent.

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3 years ago

Lilly had 14 pieces of chocolate. She wanted to give her friend 3/7 of the chocolate. How many pieces did she give to her friend

DochEvi [55]

She gave her friend 6 pieces, just multiply 14 by 3/7! hope it helped

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3 years ago