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Alona [7]
3 years ago
12

Which rational number represents a decrease in water level from 8 feet to 6 feet?

Mathematics
1 answer:
Alexxx [7]3 years ago
6 0
-6/8...I guess so
Tell me if it is right or not
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Do parallel lines intersect?
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Answer:

No parallel lines will never intersect.

Step-by-step explanation:

They go in the same direction almost like an equals sign "="

4 0
3 years ago
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In a recent year, a sample of grade 8 Washington State public school students taking a mathematics assessment test had a mean sc
Daniel [21]

Answer:

The  number is  N  =1147 students

Step-by-step explanation:

From the question we are told that

    The population mean is  \mu  =  281

     The standard deviation is  \sigma  =  34.4

    The sample size is  n = 2000

percentage of the would you expect to have a score between 250 and 305 is mathematically represented as

      P(250 <  X <  305 ) =  P(\frac{ 250 - 281}{34.4 }  <  \frac{X - \mu }{\sigma }  < \frac{ 305 - 281}{34.4 }   )

Generally  

             \frac{X - \mu }{\sigma }  =  Z  (Standardized \ value \  of  \  X )

So  

         P(250 <  X <  305 ) =  P(-0.9012<  Z

       P(250 <  X <  305 ) = P(z_2 < 0.698 ) -  P(z_1 <  -0.9012)

From the z table  the value of  P( z_2 < 0.698) =  0.75741

                                         and  P(z_1 < -0.9012) =  0.18374

     P(250 <  X <  305 ) = 0.75741 - 0.18374

      P(250 <  X <  305 ) =  0.57

The  percentage is  P(250 <  X <  305 ) =  57\%

The  number of students that will get this score is

           N  = 2000 * 0.57

           N  =1147

6 0
3 years ago
What is the approximate average rate of change of the function f(x) = -20(1.3)x^
ollegr [7]

Answer:

c

Step-by-step explanation:

7 0
3 years ago
What is the measure of m?<br> 12<br> 4.<br> n<br> m<br> m = [?]<br> Please help!
Murrr4er [49]

I think the answer to m is 8

3 0
2 years ago
Brad wants to open a new savings account. He finds one that returns 3% on his investment each year.
Rufina [12.5K]

Answer:

  • final balance: A
  • initial investment: P
  • return rate: r

Step-by-step explanation:

The variable assigments can be anything you like. It is often helpful to use variables that will remind you what they stand for. Here, we have chosen A = amount (final balance); P = principal (initial investment); r = rate.

5 0
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