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snow_tiger [21]
3 years ago
10

E=4i+3j A=5i finfd E.A=EAcos

Mathematics
1 answer:
Luba_88 [7]3 years ago
4 0

Answer:

theta = 36.87

Step-by-step explanation:

E.A= (4i+3j).5i= 20

|E| |A| =

| e| |a|   = \sqrt{4 ^{2}  +  {3}^{2}  }  \times 5 = 25

\cos(theta)  =  \frac{e.a}{ |e ||a | }  =  \frac{20}{25}  =  \frac{4}{5}  \\ theta =  \cos ^{ - 1} ( {.8} ) = 36.87

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Ok, here's a trick: If you're converting a smaller unit to a bigger unit in metric system, you divide by 10. When you are trying to convert a bigger unit to a smaller unit, multiply by 10. Decimeters are 1/10 of a meter, so you are going to multiply 2 by 10 because you are converting a bigger unit to a smaller unit, in which you get 20.

So your answer is 20 decimeters.
8 0
3 years ago
A chess club with 80 members is electing a new president. Hans received 32 votes. What percentage of the members voted for Hans?
Lerok [7]

Answer: 40%

Step-by-step explanation: To find what percentage of members voted for Hans simply multiply 32 by 100.

32 x 100 = 3200.

Then, divide that number, or 3200 by 80.

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3 years ago
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3 years ago
Please explain if you can ​
Sonja [21]

Using it's concept, the probabilities are given as follows:

19. A. 1/3.

20. F. 1/6.

<h3>What is a probability?</h3>

A probability is given by the <u>number of desired outcomes divided by the number of total outcomes</u>.

In this problem, there are 1 + 1 + 3 + 4 + 3 = 12 papers. 4 have a score of 6, hence, in item 19, the probability is:

p = 4/12 = 1/3.

Which means that option A is correct.

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Which means that option F is correct.

More can be learned about probabilities at brainly.com/question/14398287

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Step-by-step explanation:

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3 years ago
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