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Varvara68 [4.7K]
3 years ago
7

Evaluate the following:

Mathematics
1 answer:
marysya [2.9K]3 years ago
3 0

Answer:

I believe the answer is C, x+1 :)

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Yi is running for class president. To try to predict how people will vote, she wants to take a poll with a 90% confidence level
slega [8]
90The information that you'd need in determining sample size when the standard deviation is unknown is:

z-value for the given level of confidence ⇒ The level of confidence is 90% and the z-value by convention is 1.645

The margin error (E) = 4%

The proportion of the population that you'd expect to vote for Yi. If this information isn't provided, use 50%. We call this value, p, the probability of success.

The probability of not success is q = 1 - 0.5 = 0.5

STEP 1:
Half the margin error = 0.04 ÷ 2 = 0.02

STEP 2:
Multiply the probability of success by the probability of fail = 0.5 × 0.5 = 0.25

STEP 3: 
Divide z-score by half of E = 1.645 ÷ 0.02 = 82.25
Then square the answer = 82.25² = 6765 rounded to the nearest integer)

STEP 4: 
Multiply the answer from STEP 2 by the answer from STEP 4
0.25 × 6765 = 1691 (rounded to the nearest integer)

Answer: Minimum Sample Size is 1691
8 0
3 years ago
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HELP IM DESPERATE QUICK NO LINKS!!! DONT PUT LINKS
Dominik [7]

Answer:

swap the bottom two. it should be, in this order, 32+c, 0.25, 8, 0.25c

Step-by-step explanation:

4 0
3 years ago
The following table shows the assets and liabilities of the Smith family in 2005 and 2009.
umka21 [38]
Over a million dollars a year were gained with the smith family
3 0
3 years ago
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In a fruit cocktail, for every 25 ml of orange juice you need 30 ml of apple juice and 45 ml of coconut milk. What proportion of
OLga [1]

Answer:

Step-by-step explanation The apple juice is 30%and 3/10 of the proportion because:

when you add everything up: 25+30+45=100

now you must divide the whole cocktail just by the apple juice:

100 : 30 = 3.33333333

Meaning the apple juice takes 30% of the proportion. and 30% is 3/10

4 0
3 years ago
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I need help plz help me !!
elena-14-01-66 [18.8K]

Answer:

110

Step-by-step explanation:

y = 11/6x where x is in minutes

there are 60 minutes in an hour

plug in 60 as x

11/6 *60 = 11*10 = 110

6 0
3 years ago
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