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Firlakuza [10]
3 years ago
14

Someone please help??

Mathematics
1 answer:
Novay_Z [31]3 years ago
8 0

Answer:

  x = 1

Step-by-step explanation:

The base is 3. The value of 3^x will be 3 only when x=1.

_____

The value of any exponential term will be equal to the base when the exponent is 1.

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A study is conducted to determine how long a person will wait on hold on a telephone call before hanging up. A sample of 1000 pe
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Answer:

CI = ( 0,539 ; 0,599)

Step-by-step explanation:

The proportion p₀ of person that hung up the phone in the first minute of waiting is:

p₀ = 569/1000         p₀ = 0,569       p₀  =  56,9 %

Then q₀  = 1 - 0,569                          q₀  = 0,431       q₀ = 43,1 %

Sample size is  n = 1000

A 95 % CI  is:     α  = 5 %    α = 0,05      a/2 = 0,025

In z-table we look  z ( score ) for  0,025      z  = ± 1,96

Now CI for proportion is:

p₀ - z (α/2) * √ (p₀*q₀ )/n   < p < p₀ + z (α/2) * √ (p₀*q₀ )/n

we need to find out

z(α/2) * √ (p₀*q₀ )/n   =   1,96*√ ( 0,569*0,431)/1000 = 1,96 *0,01566 =0,03

Then

CI ( 95%) =  0,569 ± 0,03  =  ( 0,569 - 0,03 ;  0,569 + 0,03)

CI = ( 0,539 ; 0,599)

5 0
3 years ago
A group of 5 friends is out to diner. Each of the friends is going to order the dinner special, and they have a coupon for $10 o
Andreas93 [3]

Answer:

I believe the last one is correct

~if this is correct, plz mark brainliest thx!~

Step-by-step explanation:

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x = 60
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81x^2

Step-by-step explanation

I think

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Z=1/5

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Divide both sides by 25 which is z=5/25

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