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krok68 [10]
3 years ago
13

Find the area of the shape below.

Mathematics
1 answer:
fgiga [73]3 years ago
3 0

Answer:

240

Step-by-step explanation:

The top triangle has an area of 40 while the bottom rectangle has an area of 200. Add them together and you get 240

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3.8:(4c+3)=2:2 2/19<br><br>Please help me! I really appreciate it!
Sati [7]

Please note that in such questions, the ":" stands for ratio which in turn stands for divide. Thus, the given expression which is:

3.8:(4c+3)=2:2\frac{2}{19} will become:

\frac{3.8}{4c+3}= \frac{2}{2\frac{2}{19}}.....(Equation 1)

Now, we know that 3.8 can be rewritten as \frac{38}{10}. Also, we know that the mixed fraction 2\frac{2}{19} can be re-written as:

2\frac{2}{19}=2+ \frac{2}{19}= \frac{38+2}{19}= \frac{40}{19}

Using the above two expressions in (Equation 1) we get:

\frac{\frac{38}{10}}{4c+3}= \frac{2}{\frac{40}{19}}

\frac{\frac{38}{10}} {4c+3}= \frac{2\times 19}{40}= \frac{38}{40}

Cross-multiplication gives:

38(4c+3)=\frac{40\times 38}{10}

4c+3=44c=1

c=\frac{1}{4}

Or c=0.25

Thus, we may write the value of c as either the decimal 0.25 or the fraction \frac{1}{4}.

8 0
3 years ago
Read 2 more answers
Which value of x from the set {4, 5, 6, 7}, makes this equation true? 4(8 − x) = 8
vekshin1
4(8 - x) = 8, 32 - 4x = 8, -4x = -24, So x = 6
8 0
3 years ago
Read 2 more answers
ducational Television In a random sample of people, said that they watched educational television. Find the confidence interval
SIZIF [17.4K]

Complete Question

Educational Television In a random sample of 200 people, 159 said that they watched educational television. Find the 90% confidence interval of the true proportion of people who watched educational television. Round the answers to at least three decimal places.

Answer:

The 90% confidence interval is   0.748  <  p <  0.842      

Step-by-step explanation:

From the question we are told that

     The sample size is  n = 200

     The number of people that watched the educational television is k =  159

Generally the sample proportion is mathematically represented as

               \^ p =  \frac{159}{200}

=>               \^ p =  0.795

From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90) \%

=>   \alpha = 0.10

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the margin of error is mathematically represented as  

     E =  Z_{\frac{\alpha }{2} } * \sqrt{\frac{\^ p (1- \^ p)}{n} }

=>     E =  1.645  * \sqrt{\frac{0.795 (1- 0.795)}{200} }

=>     E = 0.04696

Generally 95% confidence interval is mathematically represented as  

      \^ p -E <  p <  \^ p +E

=>    0.795  -0.04696  <  p <  0.795 + 0.04696

=>    0.748  <  p <  0.842      

3 0
3 years ago
6 cm 4 cm 10 cm What is the surface area of the figure? square centimeters ​
PSYCHO15rus [73]

Answer:

2 x 10 x 4 + (4 + 10) x 2 x 6 = 80 + 168 = 248

5 0
2 years ago
What is the best defenition for sample as used in in statistics​
leva [86]

Answer: Well sampling is the process of choosing a representative sample from a target population and collecting data from that sample in order to understand something about the population as a whole. A data sample is a set of data collected and the world selected from a statistical population by a defined procedure.

Step-by-step explanation:

8 0
3 years ago
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