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olga nikolaevna [1]
3 years ago
11

Does anyone know how to do this

Mathematics
1 answer:
Pie3 years ago
4 0
Area = 1/2*h*c = 1/2*9,3*h = 29.8 yd^2

4,65*h = 29,8
h = 29,8/4,65
h = 6,40
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An engineer designed a valve that will regulate water pressure on an automobile engine. The engineer designed the valve such tha
BartSMP [9]

Answer:

The decision rule is  

Reject the null hypothesis  

Step-by-step explanation:

From the question we are told that

    The population mean is \mu =  5.6  \ pounds/inch^2

     The  sample size is  n =  160

      The sample mean is  \=  x =  5.7  \  pounds/ inch^2

     The variance is \sigma ^2 =  0.25

       The level of significance is  \alpha   =  0.01

The null hypothesis is  H_o  :  \mu  =  5.6

The alternative hypothesis is H_a :  \mu > 5.6

Generally the standard deviation is mathematically represented as

           \sigma =  \sqrt{\sigma ^2 }

=>         \sigma =  \sqrt{0.25  }  

=>         \sigma =  0.5  

Generally the test statistics is mathematically represented as

        z =  \frac{\= x  - \mu }{ \frac{\sigma}{\sqrt{n}  } }

=>     z =  \frac{5.7  - 5.6  }{ \frac{0.5 }{\sqrt{ 160 }  } }  

=>     z =  2.53

From the z table  the area under the normal curve to the left corresponding to  2.53   is

        p-value =  P(Z >  2.53 ) =0.0057

From the value obtained we see that the p-value  < \alpha hence

The decision rule is  

Reject the null hypothesis  

The conclusion is  

There is sufficient evidence to conclude that the believe  that the valve performs above the specifications is true

 

5 0
3 years ago
Mrs. Johnson measured 3 rectangular rooms that she wants to tile. What is the total area of the​ rooms?
stich3 [128]

Answer:

Find the area of each room and add the areas

Step-by-step explanation:

Please find the full question in the attached image

the area of rectangle is length x breadth. The area of each room would be found and the three areas would be added together

for example ,

dimension of room 1 = 5 x 3

dimension of room 2 = 2 x 3

dimension of room 3 = 4 x 5

area of room 1 = 15

area of room 2 = 6

area of room 3 = 20

total area = 15 + 6 + 20 = 41

6 0
3 years ago
Plzzzzz HELPPP WITH DIS LOOK AT THE PHOTO
lianna [129]
Vanessa can make 5 portions
4 0
2 years ago
The difference of x and y is 14. The value of x is 3 more than twice the value of y. Write two equations and solve/graph to find
vazorg [7]

Answer:

b

Step-by-step explanation:

4 0
3 years ago
Write two multiplication equations using fractions and mixed numbers. Write one equation that will have a product greater than t
HACTEHA [7]
13=6×2 40×5=200>2 that is how solved it.
7 0
3 years ago
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