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2 years ago

HELP ASAP WILL GIVE BRAINLY!

Mathematics

1 answer:

WINSTONCH [101]2 years ago

8 0

Answer:

cos 60° = 1/2

Step-by-step explanation:

$\sin( \alpha ) = \cos(90 - \alpha )$

$\sin(30) = \cos(90 - 30) \\ \sin(30) = \cos(60)$

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Write each expression without the absolute value symbol |3x+12|

klasskru [66]

Answer:

Step-by-step explanation:

|3x+12|

one is as it is one is the negative value of it

3x + 12 - (3x + 12)

- 3x - 12

That is because both negative and positive values put in am absolute value become positive.

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2 years ago

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nignag [31]

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2 years ago

What is the minimum number of clients the travel agent should survey? Note that z=1.96 for a 95% confidence interval.

slega [8]

Answer:

121

Step-by-step explanation:

Given data as per the question

Standard deviation = $\sigma$ = 840

Margin of error = E = 150

Confidence level = c = 95%

For 95% confidence, z = 1.96

based on the above information, the minimum number of clients surveyed by the travel agent is

$n = (\frac{z\times \sigma}{E})^2$

$= (\frac{1.96\times 840}{150})^2$

= 120.47

= 121

hence, the 121 number of clients to be surveyed

Therefore we applied the above formula to determine the minimum number of clients

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