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zhenek [66]
3 years ago
8

Suppose that 6.5 million students in a certain country were in 4th grade. This was 8.6% of all students in the country. Find the

number of students in the country that year. Round your answer to one decimal place.

Mathematics
1 answer:
UkoKoshka [18]3 years ago
8 0

Answer:

7560 million

Step-by-step explanation:

here is the answer for your question

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Answer:A)

Yes, the relationship is proportional.

B)

66,000 miles.

Step-by-step explanation:

A)

Yes, the graph represents a proportional relationship.

Since, A proportional relationship is one in which two quantities vary directly with each other. We say the variable y varies directly as x if:  

y=kx

for some constant k , called the constant of proportionality .

As y=12000x hence the relationship is proportional.

B)

We calculate the equation of the graph with the help of two points on the graph namely (2,24000) and (4,48000) with the help of slope-intercept form of the line.

y=mx+c where m denotes the slope of the line and c denotes the y-intercept of the line.

Here when x=2 y=24000 and when x=4 y=48000

Hence, 24000=2x+c

and 48000=4x+c

on subtracting the above two equations we have:

m=12000 and c=0

Hence, the equation of line is y=12000x

Now the value at x=5.5 is:

y=12000×5.5=66,000

Hence, the number of miles the probe travels in 5.5. hours is 66,000 miles.

Step-by-step explanation:

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2 years ago
Find the domain of f(x)=x-9/x squared-81
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Please answer these 2 questions please!
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Step-by-step explanation:

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The second answer is also proportional, because the ratios are equivalent.

The third answer is also proportional, because the line goes through the origin.

The fourth answer isn't proportional, because the ratios aren't equivalent.

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Option one because it’s going up by 50 and it’s also showing that she’s starting with the 200$ she already had
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