1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
docker41 [41]
3 years ago
5

A building casts a 17-foot shadow. A 6-foot man standing next to the building casts a 2.5-foot shadow. What is the height, in fe

et, of the building?
Mathematics
1 answer:
masha68 [24]3 years ago
7 0
So the way you would find it is a ratio. 

1. \frac{6}{2.5}     \frac{x}{17}
2. =(6)(17)/(2.5)
3. =102/2.5
4. =40.8

So the building would be 40.8 feet tall.
You might be interested in
Which expression is equivalent to 2x-2(20-3x)+12
Darina [25.2K]

Answer:

-7x-48

Step-by-step explanation:

2x-3(20-3x)+12

2x-60-9x+12     (distribute)

-7x-48

hope this helps

brainliest?

6 0
3 years ago
Life rating in Greece. Greece has faced a severe economic crisis since the end of 2009. A Gallup poll surveyed 1,000 randomly sa
elena-s [515]

Answer:

a

        The population parameter of interest is the true proportion of Greek who are suffering

    While the point estimate of this parameter is  proportion of those that would rate their lives poorly enough to be considered "suffering". which is 25%  

b

   The condition  is met

c

   The  95% confidence interval is   0.223 <  p  < 0.277

d

      If the confidence level is increased which will in turn reduce the level of significance but increase the critical value(Z_{\frac{\alpha }{2} }) and this will increase the margin of error( deduced from  the formula for margin of error i.e  E \ \alpha \  Z_{\frac{\alpha }{2} } ) which will make the confidence interval wider

e

  Looking at the formula for margin of error if the we see that if the  sample size is increased the margin of error will reduce making the  confidence level narrower

Step-by-step explanation:

From the question we are told that

    The sample size is  n  =  1000

     The  population proportion is  \r p  = 0.25

     

Considering question a

   The population parameter of interest is the true proportion of Greek who are suffering

    While the point estimate of this parameter is  proportion of those that would rate their lives poorly enough to be considered "suffering". which is 25%  

Considering question b

The condition for constructing a confidence interval is

        n *  \r p >  5\  and  \   n(1 - \r p ) >5

So  

        1000 *  0.25 > 5 \  and \  1000 * (1-0.25 ) > 5

         250  > 5 \  and \  750> 5

Hence the condition  is met

Considering question c

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

          \alpha  =  100 - 95    

          \alpha  =  5 \%

          \alpha  =  0.05

Next we obtain the critical value of \frac{\alpha }{2} from the normal distribution table, the value is  

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

Generally the margin of error is mathematically represented as

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

substituting values

         E =  1.96  *  \sqrt{ \frac{ 0.25 (1 - 0.25 ) }{ 1000} }

         E =  0.027

The  95% confidence interval is mathematically represented as

            \r p  - E  <  p  <  \r p  + E

substituting values  

           0.25 -  0.027  <  p  < 0.25 + 0.027

substituting values

           0.223 <  p  < 0.277

considering d

  If the confidence level is increased which will in turn reduce the level of significance but increase the critical value(Z_{\frac{\alpha }{2} }) and this will increase the margin of error( deduced from  the formula for margin of error i.e  E \ \alpha \  Z_{\frac{\alpha }{2} } ) which will make the confidence interval wider

considering e

     Looking at the formula for margin of error if the we see that if the  sample size is increased the margin of error will reduce making the  confidence level narrower

   

5 0
3 years ago
State the domain: { (2,4) (0,7) (1,1) (9,1)}
LuckyWell [14K]

Given D = Domain

D = {2,0,1,9}

4 0
3 years ago
Triple a number, minus the sum of the number and six
9966 [12]

\large \mathfrak{Solution : }

let the number be x

According to above statement :

  • 3x - (x + 6)

  • 3x - x - 6

  • 2x - 6

6 0
2 years ago
Read 2 more answers
Find the area of this trapezoid plz help
kobusy [5.1K]
The total area is 165.
3 0
3 years ago
Other questions:
  • At the grocery Store,ayla buys 1 one third pounds of ground turkey.Tasha buys 2 times as much ground turkey as ayla. How much gr
    7·1 answer
  • Marcel is purchasing a board to build a bookcase. He wants to divide the board into 1.75 foot sections . He need six sections .
    8·1 answer
  • For what values of x will the result of 5x be greater than 1
    7·1 answer
  • Edgar wants to plot the ordered pair 1.8 -1.2 ona coordinate plane. On each axis one grid square equals 0.1. starting atb the th
    5·1 answer
  • Which of the following symbols could correctly finish the statement? select all that apply.
    6·1 answer
  • Find the volume of the sphere. express your answer in term of Pie​
    7·1 answer
  • How do you use the order of operations to simplify expression with exponent
    5·2 answers
  • What is the solution of the system?
    9·2 answers
  • 3. Use proportional reasoning to answer the following question.
    9·1 answer
  • (0.020) (0.030) / (0.10)x = 2.3 × 10-4
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!