3 years ago

Help me out with this question

Mathematics

1 answer:

muminat3 years ago

5 0

Answer:

The size of the sample is 23 scientists.

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If sin theta = sqrt(2/2), which could not be the value of theta?

Nataliya [291]

The solution would be like this for this specific problem:

sin(θ°) = √(2)/2

θ° = 360°n + sin⁻¹(√(2)/2) and θ° = 360°n + 180° − sin⁻¹(√(2)/2)
θ° = 360°n + 45° and θ° = 360°n + 135° where n∈ℤ

360°*0 + 45° = 45°
360°*0 + 135° = 135°
360°*1 + 45° = 405°

sin(225°) = -√(2)/2

225 has an angle where sin theta= -(sqrt2)/2 therefore, the value of theta cannot be 225 degrees.

4 0

3 years ago

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What is the probability that the first marble is blue and the second marble is yellow?

Cloud [144]

Answer:

$\frac{1}{14}$

Step-by-step explanation:

First time drawing:

Total outcome is 8

Favorable outcome is 2

The probability that the first marble drawing in random is blue is

$\frac{2}{8}$ = $\frac{1}{4}$

Second time drawing (with no replacement):

Total outcome is 7 (8 - 1 = 7)

Favorable outcome is 2

The probability that the second marble drawing in random is yellow is

$\frac{2}{7}$

The probability that the first marble is blue and the second marble is yellow is $\frac{1}{4}$ × $\frac{2}{7}$ = $\frac{2}{28}$ = $\frac{1}{14}$

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3 years ago

Jack is learning to save, spend, and give his money away. He had determined to give away 10% of his summer job earnings. If he g

nadezda [96]

Answer:

$2304

Step-by-step explanation:

Multiply $256 by 10 to get 100%, then minus the 10% he gave away ($256).

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4 years ago

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A digit in the hundredths place has ten times the value of the same digit in the thousands place

bagirrra123 [75]

That is true very good

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4 years ago

Pleaseee helpppppp!!!

mr Goodwill [35]

The measure of a straight line is 180

125+30=155

180-155=25

x = 25

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3 years ago

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Help me out with this question ​

Help me out with this question