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Alecsey [184]
3 years ago
6

In preparing a report on the​ economy, we need to estimate the percentage of businesses that plan to hire additional employees i

n the next 60 days.
​a) How many randomly selected employers must we contact in order to create an estimate in which we are 95​% confident with a margin of error of 8​%?
​b) Suppose we want to reduce the margin of error to 3​%. What sample size will​ suffice?
​c) Why might it not be worth the effort to try to get an interval with a margin of error of 1​%?
​a) A sample size of
nothing is needed.
Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
3 0

Answer:

Fiji;of i def

Step-by-step explanation:

h dfuhdsoif josidjfoidwjfosdiopfjdi jf

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The number 5/9 is an example of a
Bond [772]

Answer:

5/9 is an example of rational number.

Step-by-step explanation:

as the definition of rational number is the number in the form of p/q but the value of denominator q should not be equal to 0. Every integer is a rational number.

8 0
3 years ago
1. If a - b = 4 and a + b = 12, what is the<br> value of a?
Nezavi [6.7K]

I think this is what you are looking for:

=−12

a

b

=

−

12

+=4

a

+

b

=

4

(+)2=42

(

a

+

b

)

2

=

4

2

2+2+2=16

a

2

+

b

2

+

2

a

b

=

16

∴2+2=16+2×12=40

∴

a

2

+

b

2

=

16

+

2

×

12

=

40

Now, (−)2=2+2−2=40+2×12=64

(

a

−

b

)

2

=

a

2

+

b

2

−

2

a

b

=

40

+

2

×

12

=

64

∴(−)=64‾‾‾√=±8

∴

(

a

−

b

)

=

64

=

±

8

So, 2−2=(+)(−)

a

2

−

b

2

=

(

a

+

b

)

(

a

−

b

)

2−2=(4)(±8)=±32

a

2

−

b

2

=

(

4

)

(

±

8

)

=

±

32

Hope that helps and sorry if it is confusing!

4 0
3 years ago
Read 2 more answers
-4x - 2 = -18 POR FA AYUDENME
charle [14.2K]

Answer:

The answer is x=4

Step-by-step explanation:

so you have -4x-2=-18

so we get rid of -2 by adding it to the other side so you'll end up having -4x=-16

you then divide that by -4 on both sides and get x=4 as your remaining answer

6 0
3 years ago
Read 2 more answers
Simplify these fraction 9 1/3-5 3/4
poizon [28]

Answer : 3 7/12

Hope it helps yah (◕ᴗ◕✿)

8 0
3 years ago
Read 2 more answers
Please help answering questions 215 and 216.
kodGreya [7K]

Problem 215

Check out the attached image. Line up the letters ABC and CDE so the first set of letters are over the second set of letters. Order is important here. Note how A corresponds to C (second C), B corresponds to D, and (the first) C corresponds to E.

We have this mapping:

A <--> C

B <--> D

C <--> E

This means...

Angle BAC corresponds to Angle DCE (red angles)

Angle ABC corresponds to Angle CDE (blue angles)

Angle BCA corresponds to Angle DEC (green angles)

It also means...

Side BC corresponds to Side DE (red sides)

Side AC corresponds to Side CE (blue sides)

Side AB corresponds to Side CD (green sides)

Check out the attached image which I hope clears up any confusion you may have. Often I think it helps to represent stuff like this in a visual way.

============================================

Problem 216

Answer: True

Since triangle ABC is congruent to triangle DEF, this means that side AB is congruent to side ED. These are corresponding sides. Since AB = 6, this means ED = 6 as well.

8 0
3 years ago
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