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3 years ago

Architects make scale models of buildings to present their ideas to clients. If an

Mathematics

1 answer:

MaRussiya [10]3 years ago

5 0

The area of the model is 80 square foot

Step-by-step explanation:

Let the area of the house model be 'a'

The scale = 1:50

The area of the house= 4000 square foot

Area of the model =4000/50

a = 80 square foot

The area of the model is 80 square foot

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Which expressions can have the value of 9/20

wariber [46]

Answer:

9 DIVIDED BY 20 THAT IS BASICALLY AN EXPRESSION!

Step-by-step explanation:

6 0

2 years ago

Find the minimum sample size needed to estimate the percentage of Democrats who have a sibling. Use a 0.1 margin of error, use a

Brums [2.3K]

Answer:

The minimum sample size is $n =135$

Step-by-step explanation:

From the question we are told that

The confidence interval is $( lower \ limit = \ 0.44,\ \ \ upper \ limit = \ 0.51)$

The margin of error is $E = 0.1$

Generally the sample proportion can be mathematically evaluated as

$\r p = \frac{ upper \ limit + lower \ limit }{2}$

$\r p = \frac{ 0.51 + 0.44}{2}$

$\r p = 0.475$

Given that the confidence level is 98% then the level of significance can be mathematically evaluated as

$\alpha = 100 - 98$

$\alpha = 2\%$

$\alpha =0.02$

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

The value is

$Z_{\frac{\alpha }{2} } = 2.33$

Generally the minimum sample size is evaluated as

$n =[ \frac { Z_{\frac{\alpha }{2} }}{E} ]^2 * \r p (1- \r p )$

$n =[ \frac { 2.33}{0.1} ]^2 * 0.475(1- 0.475 )$

$n =135$

6 0

3 years ago

Help please <br> Hurry!!!!

Alex787 [66]

C I know I took test

7 0

2 years ago

Y’all please help me i’ll give brainlest i just wanna pass

Serggg [28]

The answer would be a

5 0

2 years ago

At a little-known vacation spot, taxi fares are a bargain. A 14-mile taxi ride takes 16 minutes and costs $11.20. You want to

sergeinik [125]

Answer:

$29.60

Step-by-step explanation:

$11.20/14 miles = $0.80 per mile

$0.80 x 37 = $29.60

6 0

2 years ago

Read 2 more answers