Is it a function?<br> (-2, 2), (-1,2), (0, 2), (1.0), (2,0)

I NEED HELP: So this question came on a quiz I'm taking and the answer I got was $1,723.45 but it says its incorrect can someone

Olin [163]

Answer: the answer is right, try putting a $ in front of it, sometimes those programs mess up if you aren't specific

5 0

3 years ago

Rico picked 16 lb of peaches and shared

ser-zykov [4K]

Answer:

$2\frac{2}{3}$

Step-by-step explanation:

16 divided by 6 is 2.66666667

Since 1/3 is .33 , 2/3 is .66

4 0

2 years ago

A survey of 76 commercial airline flights of under 2 hours resulted in a sample average late time for a flight of 2.55 minutes.

nika2105 [10]

Answer:

The best point of estimate for the true mean is:

$\hat \mu = \bar X = 2.55$

$2.55-1.96\frac{12}{\sqrt{76}}=-0.148$

$2.55+1.96\frac{12}{\sqrt{76}}=5.248$

Since the time can't be negative a good approximation for the confidence interval would be (0,5.248) minutes. The interval are tellling to us that at 95% of confidence the average late time is lower than 5.248 minutes.

Step-by-step explanation:

Information given

$\bar X=2.55$ represent the sample mean for the late time for a flight

$\mu$ population mean

$\sigma=12$ represent the population deviation

n=76 represent the sample size

Confidence interval

The best point of estimate for the true mean is:

$\hat \mu = \bar X = 2.55$

The confidence interval for the true mean is given by:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (1)

The Confidence level given is 0.95 or 95%, th significance would be $\alpha=0.05$ and $\alpha/2 =0.025$ . If we look in the normal distribution a quantile that accumulates 0.025 of the area on each tail we got $z_{\alpha/2}=1.96$

Replacing we got:

$2.55-1.96\frac{12}{\sqrt{76}}=-0.148$

$2.55+1.96\frac{12}{\sqrt{76}}=5.248$

Since the time can't be negative a good approximation for the confidence interval would be (0,5.248) minutes. The interval are tellling to us that at 95% of confidence the average late time is lower than 5.248 minutes.

7 0

3 years ago

Which graph represents the function over the interval [-3, 3]?<br> floor-2

murzikaleks [220]

Answer:

In mathematics, the functions of the whole part are functions that take a real number and return a whole number, either by excess or by default.

Function floor (or ground), that to each real number assigns the nearest whole number by defect, that is to say, the greater whole number equal or smaller than that real number.

Let's evaluate the extremes of the interval

x = -3

g (-3) = floor (-3) -2 = -5

x = 3

g (3) = floor (3) -2 = 1

Therefore, the graph that best corresponds to the function in the given interval is the attached graph.

Step-by-step explanation:

7 0

4 years ago

Sheila predicts that 480 people will attendthe fall concert. There was an actual total of 350 people who attended the fall conce

iris [78.8K]

Answer:

27 %

Step-by-step explanation:

Given that Sheila predicts that 480 people will attendthe fall concert and There was an actual total of 350 people who attended the fall concert.

We know that

Percent error = $\frac{people present-predicted people}{predicted people}\times100$

Percent error = $\frac{480-350}{480}\times100$

Percent error = 27 %

5 0

3 years ago

Is it a function? (-2, 2), (-1,2), (0, 2), (1.0), (2,0)