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aev [14]
3 years ago
12

A graph is drawn to represent a relationship between distance, d, and time, t. Which situation could be represented on the graph

?
- Each point shows the distance, in feet, above the ground of a falling object after t seconds, where the falling speed increases as time increases.
- Each point shows the distance, in feet, covered t seconds after a brake is applied, where the speed of the car decreases by a constant factor.
- Each point shows the distance, in feet, traveled by an airplane on a runway by gradually increasing speed t seconds after being approved for takeoff.
- Each point shows the remaining distance, in feet, to the finish line of a race t seconds after a runner begins the final stretch and runs at a constant speed.

Mathematics
2 answers:
Triss [41]3 years ago
7 0

Answer:

D: Each point shows the remaining distance, in feet, to the finish line of a race t seconds after a runner begins the final stretch and runs at a constant speed.

Putting this here in case you don't have BrainlyPlus

Deffense [45]3 years ago
4 0
The graph forms a straight line going downwards. The straight line means that the speed is constant. It is going downwards meaning it is stopping. 

The best statement that represents the graph is:

<span>Each point shows the remaining distance, in feet, to the finish line of a race t seconds after a runner begins the final stretch and runs at a constant speed.</span>

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The marketing manager for an automobile manufacturer is interested in determining the proportion of new compact-car owners who w
Serhud [2]

Answer:

z=\frac{0.395 -0.3}{\sqrt{\frac{0.3(1-0.3)}{200}}}=2.932  

p_v =2*P(z>2.932)=0.0034  

So the p value obtained was a very low value and using the significance level given \alpha=0.01 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of people that they would have purchased the GPS navigation system is significantly different from 0.3

Step-by-step explanation:

Data given and notation

n=200 represent the random sample taken

X=79 represent the  number of people that they would have purchased the GPS navigation system

\hat p=\frac{79}{200}=0.395 estimated proportion of people that they would have purchased the GPS navigation system

p_o=0.3 is the value that we want to test

\alpha=0.01 represent the significance level

Confidence=99% or 0.99

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is 0.3 or no.:  

Null hypothesis:p=0.3  

Alternative hypothesis:p \neq 0.3  

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.395 -0.3}{\sqrt{\frac{0.3(1-0.3)}{200}}}=2.932  

Statistical decision  

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

The significance level provided \alpha=0.01. The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:  

p_v =2*P(z>2.932)=0.0034  

So the p value obtained was a very low value and using the significance level given \alpha=0.01 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of people that they would have purchased the GPS navigation system is significantly different from 0.3

4 0
3 years ago
Determine the value of x in the given figure help
bearhunter [10]

Answer:

x = 25

Step-by-step explanation:

The angles in a triangle must add up to 180 degrees, so:

180 - (53 + 27) = 100

100 ÷ 4 = 25

8 0
3 years ago
Subtract: –6 – (–3)<br> –9<br><br> –3<br><br> 3<br><br> 9
Masja [62]

what the answer is its -3

5 0
3 years ago
Read 2 more answers
A store pays $ 56 for a cell phone. The store marks the price at 20%. What is the quantity of the mark?
galben [10]

Answer:

The quantity of the mark is $11.20

Step-by-step explanation:

Given that:

Amount paid by store for cell phone = $56

The store marks the price at 20%.

Quantity of the mark = 20% of 56

Quantity of the mark = \frac{20}{100}*56

Quantity of the mark = 0.2 * 56

Quantity of the mark = $11.20

Hence,

The quantity of the mark is $11.20

4 0
3 years ago
using the two points find the slope then write the equation in slope intercept form AND standard form. (-6, 4) and (0, 3)
Paraphin [41]

so to find the slope we do y2- y1/ x2-x1

plug in the coordinates: (-6,4) (0,3)

3-4/ 0--6

3-4/0+6

= -1/6

Then using the formula of slop intercept form: y=mx+b........ use one of the coordinates to plug in

4= -1/6x+b...... multiply -6/1 on both sides of equation ( you do this so -1/6 and -6/1 can cancel out)

-24=b........ Use b to plug in y=mx+b---------> y= -1/6x-24




5 0
3 years ago
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