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SashulF [63]
3 years ago
15

Kendra was asked to find the number of students who planned to attend the evening symphony performance. She was told that 40 per

cent of the 50 students planned to attend. Kendra’s work is shown below.

Mathematics
1 answer:
asambeis [7]3 years ago
3 0

Answer:

Kendra should of divided by 2

Step-by-step explanation:

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A group conducted a poll of 2025 likely voters just prior to an election. The results of the survey indicated that candidate A w
FrozenT [24]

Answer:

Check Explanation

Step-by-step explanation:

Confidence Interval for the population proportion is basically an interval of range of values where the true population proportion can be found with a certain level of confidence.

Mathematically,

Confidence Interval = (Sample proportion) ± (Margin of error)

The population proportion can take on any value within the confidence interval obtained.

So, for each candidate, we can calculate the confidence interval for the population proportion of popular votes they would each receive.

For candidate A,

Sample Proportion = 47%

Margin of Error = 2%

Confidence Interval = (47%) ± (2%)

Confidence interval = (45%, 49%)

For candidate B,

Sample Proportion = 46%

Margin of Error = 2%

Confidence Interval = (46%) ± (2%)

Confidence interval = (44%, 48%)

The true proportion of popular votes for the two candidates will lie between

Confidence Interval for candidate A

(45%, 49%)

Confidence Interval for candidate B

(44%, 48%)

So, the true proportion of popular votes for candidate A can take on any value from 45% to 49%, and that for candidate B can take on values from 44% to 48%.

Because, A could have 45% and B have 48% or A could have 47% and B too have 47%.

The clear winner cannot be determined from this confidence interval obtained from the survey, it really is too close to call!

Hope this Helps!!!

5 0
3 years ago
The answer to this equation​
12345 [234]

Answer:

x=3

Step-by-step explanation:

We are given the equation

log5x=log(2x+9)

This can be rewritten as

log5x-log(2x+9)=0

Now using the quotient rule for logarithms we can combine these two

log(\frac{5x}{2x+9} )=0

Next we can remove the log by using an inverse operation

10^{log(\frac{5x}{2x+9} )} =10^0\\\\\frac{5x}{2x+9}=1

Now we can solve for x

\frac{5x}{2x+9}=1\\\\5x=2x+9\\\\3x=9\\\\x=3

4 0
3 years ago
A shopkeepers bought 500 glass tumblers at rs 40 each . 20 glass tumblers were broken and he sold the rest at rs 45 each. Find h
Alona [7]

500 at 40 each = £20000

To make a profit he needs to make more than £20000

20 broke so he sold 500-20 = 480 at 45 each.

480 x 45 = 21600

Profit = 21600 -20000 = 1600

His profit was £1,600

4 0
2 years ago
What is greater. <br> 1.09 or 1.1<br> 8/7 or 1.1<br> -1.09 or -1.1<br> -8/7 or -1.1
4vir4ik [10]
1.1 is greater
8/7 is greater
-1.09 is greater
-1.1 is greater
3 0
3 years ago
Read 2 more answers
Please help me with this question
lina2011 [118]

Step-by-step explanation:

1. 120+21 =141

2. 21-3=18

3. 7x-21

4. 4x+20

5. 45+100=145

6. 40+5c

7. 20+22r+26s

Im not too sure about the other question

7 0
3 years ago
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