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Lana71 [14]
2 years ago
7

(30 points for answering! If you show steps I will give brainliest!)

Mathematics
1 answer:
Serjik [45]2 years ago
3 0

The width of park is \frac{7}{4} miles.

Step-by-step explanation:

Given,

Area of park  = \frac{7}{8}\ square\ miles

Length of park = \frac{4}{8}\ mile

Let,

w be the width of park.

Area = Length * Width

\frac{7}{8}=\frac{4}{8}w

Multiplying both sides by \frac{8}{4}

\frac{8}{4}*\frac{7}{8}=\frac{8}{4}*\frac{4}{8}w\\\frac{7}{4}=w\\w=\frac{7}{4}\ mile

The width of park is \frac{7}{4} miles.

Keywords: area, rectangles

Learn more about rectangles at:

  • brainly.com/question/11234838
  • brainly.com/question/11236033

#LearnwithBrainly

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Is 91.7% rational or irrational​
nadezda [96]

Answer: Hi! 91.7% is a rational number. Because...

Step-by-step explanation: rational number is a number that can be expressed as the quotient or fraction p/q of two integers, a numerator p and a non-zero denominator q. Since q may be equal to 1, every integer is a rational number. Hope this helps!

3 0
3 years ago
Grades on a standardized test are known to have a mean of 1000 for students in the United States. The test is administered to 45
krok68 [10]

Answer:

a

The 95% confidence interval is 1003  <  \mu

b

Yes there is statistically significant evidence that students in Florida perform differently from other students in the United States

Step-by-step explanation:

From the question we are told that

   The population mean is  \mu =  1000

   The sample size is  n =  453

   The sample mean is  \= x  = 1013

    The standard deviation is s =  108

   

Given that the confidence level is  95% then the level of significance is mathematically represented as

            \alpha  =  100 - 95

=>         \alpha  =  5\%

=>          \alpha  = 0.05

The critical value  for \frac{\alpha }{2} obtained from the normal distribution table is          

          Z_{\frac{\alpha }{2} } =  1.96

Generally the margin of error is mathematically represented as

         E =  Z_{\frac{\alpha }{2} } *  \frac{s}{\sqrt{n} }

=>     E =  1.96 *  \frac{108}{\sqrt{453} }

=>      E = 9.946

Generally the 95% confidence interval is mathematically represented as

           \= x  - E  <  \mu <  \= x + E

=>         1013  - 9.946  <  \mu < 1013  + 9.946

=>         1003  <  \mu

Given that the population mean(1000) is not within the 95% confidence interval for l for the average test score for students in Florida, then it means that there is statistically significant evidence that students in Florida perform differently from other students in the United States

 

4 0
3 years ago
When the expression 3(n + 7) is evaluated for a given value of n, the result is 33. What is the value of n.
Scorpion4ik [409]

Answer:

i think n = 4

Step-by-step explanation:

3(n+7) = 33

3n+21 = 33

3n = 12

n = 4

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PLEASE HELP. Which is the best interpretation of the solution set for the compound inequality? 3/2x-1&lt;2x + 4 or 3(2/3x + 1) &
Fudgin [204]
(3/2)x-1<2x+4
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3((2/3)x + 1) < 11
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