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levacccp [35]
3 years ago
11

Question / Of 9

Mathematics
1 answer:
mario62 [17]3 years ago
4 0

Answer:

i was gonna answer this but im

im late :(

Step-by-step explanation:

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The value of (a–1)+92 - +24,5 " when a= 2 and b=-1
Andre45 [30]

Answer:

256271

Step-by-step explanation:

6165253-6728282-289292

3 0
3 years ago
5. Kal Tire installs automobile tires on a first-come first-served basis. A random sample of 50 customers experienced an average
Rainbow [258]

5.7099 is the margin of error.

<h3>What is standard deviation ?</h3>

A standard deviation (or σ) is a measure of how dispersed the data is in relation to the mean.

Low standard deviation means data are clustered around the mean, and high standard deviation indicates data are more spread out.

According to the question,

The standard sampling error of the sample mean is σₓ ,

The sampling distribution is: N (u,σₓ/n)

Therefore,

By using the standard deviation formula:

σₓ = √∑(xi -μ)/N

Where,

∑= population standard deviation

N= the size of the population

xi= each value from the population

μ =the population mean

So ,

σₓ = \frac{20.6}{\sqrt{50} } = 2.913

Since, a = 1- 95% = 0.05

therefore Z\frac{a}{2} = (1-0.005 x 2) = 1.959964

Here, the margin of error for a 95% confidence interval for this sample is given by:

Z\frac{a}{2} * σₓ = 1.959964 x 2.913    

           = 5.7099

5.7099 is the margin of error for a 95% confidence interval for this sample.

Learn more about standard deviation here:

brainly.com/question/13905583

#SPJ1

7 0
2 years ago
A rectangular swimming pool measures 14 feet by 30 feet. The pool is
Zolol [24]

Answer:

The total cost of resurface the path is \$600

Step-by-step explanation:

step 1

Find the area of the path

The area of the path is equal to the area of the path plus the swimming pool minus the area of the swimming pool

A=(14+3+3)(30+3+3)-(14)(30)

A=(20)(36)-(14)(30)

A=300\ ft^{2}

step 2

Find the cost of resurface the path

Multiply the area of the path by $2 per square foot

300*2=\$600

4 0
3 years ago
20 POINTS!!! Find the vertex of the quadratic function given below. f(x)=(x-4)(x+2)
irga5000 [103]

The vertex of  f ( x )  is at  x  =  − 8/ 2   =  − 4

3 0
3 years ago
In AABC, m A= 60°, m_C = 30°, and AB = 6 inches. What is the length of side BC?
nlexa [21]

Answer:

answer is (C)

Step-by-step explanation:

this is a right angle triangle

so tan 60 degree = bc/6

√3. = bc/6

√3×6= bc

10.39 inches

8 0
2 years ago
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