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3 years ago

I need this ASAP!!!! PLZ HELP!!! 20 points!!

Mathematics

2 answers:

Dimas [21]3 years ago

8 0

I think it’s the 3rd one I’m sorry if I’m not correct

sergiy2304 [10]3 years ago

7 0

Answer:

Third graph C.

Step-by-step explanation:

3a + 11 > 5

Subtract 11 from both sides

3a > -6

Solve for a

a = -6/3

a > -2

so a would be all numbers greater than -2

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A random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph. From past information, it is kn

loris [4]

Answer:

95 percent confidence interval for μ is determined by

(60.688 , 69.312)

a) be the same

Step-by-step explanation:

Step (i):-

Given data a random sample of 121 automobiles traveling on an interstate showed an average speed of 65 mph.

The sample size is n= 121

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

Step (ii) :-

Given The 95 percent confidence interval for μ is determined as

(61.08, 68.92)

we are to reduce the sample size to 100 (other factors remain unchanged) so

given The sample size is n= 100

The mean of the sample x⁻ = 65mph.

The standard deviation of the population is 22 mph

σ = 22mph

Step (iii):-

95 percent confidence interval for μ is determined by

$(x^{-} - 1.96\frac{S.D}{\sqrt{n} } , x^{-} + 1.96 \frac{S.D}{\sqrt{n} } )$

$(65 - 1.96\frac{22}{\sqrt{100} } , 65 + 1.96 \frac{22}{\sqrt{100} } )$

(65 - 4.312 ,65 +4.312)

(60.688 , 69.312) ≅(61 ,69)

This is similar to (61.08, 68.92) ≅(61 ,69)

Conclusion:-

it become same as (61.08, 68.92)

4 0

4 years ago

Justin wants to cover the top of a circular swimming pool to keep insects out of the pool. If the diameter of the pool is 20 fee

evablogger [386]

Answer: The area is approximately 314 ft^2

Step-by-step explanation:

Well if the diameter is 20 feet then the radius will be 10 because the radius is half the diameter, and to find the area of a circle, you use the formula

A= $\pi r^{2}$ where A is the area and pi times the radius squared.

We will represent pi by 3.14

A= 3.14* 10^2

A= 3.14 * 100

A = 314

6 0

3 years ago

How do you calculate the probability of an outcome?

mojhsa [17]

Fractions. For example, if I have one 6 sided dice and I rolled it, I got a 4. So that fraction would be 1/6, one representing the likelihood of that happening and six representing the total outcomes. Then I roll again I get a one. That fraction would be 1/6. Then Multiply

1/6*1/6=1/36

5 0

3 years ago

Need the answer fast

Westkost [7]

Your answer should be 97 bb

5 0

3 years ago

Read 2 more answers

Solve for x. A) 6 C) 4 B) 12 D) 2

arsen [322]

Answer:

x=4

Step-by-step explanation:

go it right on edge

4 0

3 years ago