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icang [17]
3 years ago
9

Sarah walks 1/4 mile every 1/2 hour​

Mathematics
2 answers:
padilas [110]3 years ago
6 0

Answer:

To find ratio mph (miles PER hour), we can write the information given as a fraction. (The miles will go on top and the number of hours will go on the bottom).

1/2=.5 miles

1/4-.25 miles

So we have .5miles/.25 hours

From here, we can do 2 things: divide to get 2miles/hour or you can see that you can reduce the fraction (.5/2=.25 and .25/.25=1). So again we get 2/1 miles per hour OR 2 mph

Hope that helps,

Gracie

ohaa [14]3 years ago
6 0

Answer:

0.5 miles per hour

Step-by-step explanation:

0.25 miles ÷ 0.5

0.5 hours ÷ 0.5

-----------------------------

=0.5 miles

1 hour

------------------

=0.5 miles

hour

---------------------

= 0.5 miles per hour

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Area of the grass area only:<br><br> Area of the track only:
VikaD [51]

Answer:

Step-by-step explanation:

area including track=area of 2 semi circles+area of rectangle

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=2116 π+5590

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area of track=2116π+5590-1600π-5200

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7 0
3 years ago
4.48 Same observation, difference sample size: Suppose you conduct a hypothesis test based on a sample where the sample size is
Lemur [1.5K]

Answer:

P-value is lesser in the case when n = 500.

Step-by-step explanation:

The formula for z-test statistic can be written as

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here, μ = mean

σ= standard deviation, n= sample size, x= variable.

From the relation we can clearly observe that n is directly proportional to test statistic. Thus, as the value of n increases the corresponding test statistic value also increases.

We can also observe that as the test statistic's numerical value increases it is more likely to go into rejection region or in other words its P-value decreases.

Now, for  first case when our n is 50 we will have a relatively low chance of accurately representing the population compared to the case when n= 500. Therefore,  the P-value will be lesser in the case when n = 500.

6 0
3 years ago
What is the vertex of the graph of f(x) = 4(x+5)²-1?​
vodomira [7]

Answer:

The vertex is (-5,-1)

Step-by-step explanation:

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This is written in vertex form

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f(x) = 4(x- -5)²-1

H is -5 and k = -1

The vertex is (-5,-1)

7 0
3 years ago
Read 2 more answers
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lbvjy [14]

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Step-by-step explanation:

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