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2 years ago

How do you redraw a scale drawing with a new scale

1 answer:

3 0

Take measurements of what you want to draw, (e.g. a simple cube that is 100 cm x 100 cm x 100 cm.)
A full scale drawing would require you to draw the cube on a paper 100 cm x 100 cm x 100 cm.
If you want to 'scale', you would then redraw using new measurements. So, a 1/10 scale drawing would mean that you would redraw the cube on paper as 10 cm x 10 cm x 10 cm.
A 1/20 scale would be 5 cm x 5 cm x 5 cm. The same concept holds for all scale drawings.

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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.02 margin of er

Brrunno [24]

Answer: 2172

Step-by-step explanation:

Formula to find the sample size n , if the prior estimate of the population proportion(p) is known:

$n= p(1-p)(\dfrac{z^*}{E})^2$ , where E= margin of error and z* = Critical z-value.

Let p be the population proportion of adults have consulted fortune tellers.

As per given , we have

p= 0.20

E= 0.02

From z-table , the z-value corresponding to 98% confidence interval = z*=2.33

Then, the required sample size will be :

$n= 0.20(1-0.20)(\dfrac{2.33}{0.02})^2$

$n= 0.20(0.80)(116.5)^2$

$n= 2171.56\approx2172$

Hence, the required sample size = 2172

3 0

2 years ago

What is the zero of g(X) =<br> -X - 7

gogolik [260]

(-7,0) (0,-7) should be the zeros

3 0

2 years ago

Solve the inequality.<br><br> 9(2 − x) − 4(2 − 3x) > 9

e-lub [12.9K]

Remove both sets of brackets.

18 - 9x - 8 + 12x > 9 Collect like terms on the left.

12x - 9x + 18 - 8 > 9

3x + 10 > 9 Subtract 10 from both sides.

3x > 9 - 10

3x > - 1 divide by 3

x > -1/3

Notice what the graph is telling you. A blue dotted line is going through x = - 1/3 or - 0.3333

Everything to the right of - 0.333 is colored blue and that means anything to the right if going to be a solution to the inequality. To confirm this for yourself, try zero and 1. Both should give larger than 9 solutions.

4 0

3 years ago

Read 2 more answers

A wise man once said, "400 reduced by 3 times my age is 133." what is his age?

boyakko [2]

Let the age of the wise man be x years. And in the question it is said that , 400 reduced by 3 times my age is 133, that is,

400-3x =133

Now we need to solve for x, and for that first we subtract 133 to both sides

400-133-3x=0

267-3x = 0

3x=267

Next is to get rid of 3 by dividing both sides by 3, that is

x = 89 years

And that's his age .

4 0

3 years ago

Read 2 more answers

Halfway through the second quarter, what fructional part of the game is left?

nirvana33 [79]

Answer:

5/8 of the game

Step-by-step explanation:

Half of a quarter is 1/2, and 1 quarter is already done, therefore 1/2, or to simplify it 1/8, plus 2/8, would be 3/8. Now, a quarter is 1/4th of something therefore there must be 4 quarters in a total.so that means that there are 8 halfves in total , so 8-3=5, so the fractional parts of the game left is 5/8.

7 0

2 years ago

Read 2 more answers