Help as soon as you can pls!! I’m a bit confused on the questions asked below

Mathematics

1 answer:

Delicious77 [7]2 years ago

3 0

Answer:

Step-by-step explanation:

When finding the margin of error for the mean of a normally distributed population from a sample, what is the critical probability, assuming a confidence level of 58%?

1111

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A box contains 7 red balls and 2 blue balls. how many more blue balls do you need to add to the box to make the probobility of p

xenn [34]

Using the probability concept, the number of blue balls you need to add is:

D) 5.

<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>.

A probability of 0.5 is reached if the number of red balls is the same as the number of blue balls. Current the difference is of 7 - 2 = 5, hence 5 blue balls must be added.

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

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5 0

2 years ago

Franklin high school has 4 valedictorians. in how many different ways can they give their graduation speech

saw5 [17]

Answer:

Number of ways = 4!

= 4×3×2×1

= 24ways

Step-by-step explanation:

6 0

3 years ago

Marie gets a gift of $100 for her birthday. After that, she earns $20 per week for babysitting

Lostsunrise [7]

Answer:

y=20x+100

y-intercept= 100

slope= 20/1

Step-by-step explanation:

Since 100 is the constant, the y-intercept(b) is equal to 100. And if she earn's 20 dollars each week it's the changing amount.

4 0

3 years ago

A bird has a mass of 26 g and perches in the middle of a stretched telephone line. (a) Show that the tension in the line can be

Semmy [17]

Answer:

a) is demonstrated below, b) T=1.462N, c) T=14.6N

Step-by-step explanation:

a) Refer to the attached diagram.

Since the bird is standing in the middle of the line and each half is a straight line, Ta=Tb, so we will call the tension T=Ta=Tb and Tay=Tby

By trigonometry Tay=Ta·Sinθ

Since the system is in equilibrium W=Tay+Tby then:

W=2·Tay=2·Ta·Sinθ=2·T·Sinθ

Since W=mg, being m the mass of the bird and g, gravity:

$mg=2TSin\theta$