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2 years ago

The school that Chelsea goes to is selling tickets to a choral performance. On the first day of

Mathematics

2 answers:

enyata [817]2 years ago

6 0

$7 for an adult ticket
$6 for a child ticket

alekssr [168]2 years ago

6 0

Answer:

Adult: $14 each

Child: $3 each

Step-by-step explanation:

Day 1: (14*8)+(3*7) = 112+21 = 133

Day 2: (14*9)+(3*2) = 126+6 = 132

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A taxicab company charges $4.50 for each trip

prisoha [69]

Answer:

Step-by-step explanation:

5 miles + 16 miles = 21 miles

each mile is 2.50

21 x 2.50 = 52.50

trip is 4.50

52.50 + 4.50 = 57

7 0

3 years ago

Read 2 more answers

Use 6.84 days as a planning value for the population standard deviation. a. Assuming 95% confidence, what sample size would be r

vlabodo [156]

Answer:

The sample size required is $n = (\frac{1.96*6.84}{M})^2$ , in which M is the desired margin of error. If n is a decimal number, it is rounded up to the next integer.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

Now, we have to find z in the Z-table as such z has a p-value of $1 - \alpha$ .

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

Now, find the margin of error M as such

$M = z\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

Use 6.84 days as a planning value for the population standard deviation.

This means that $\sigma = 6.84$ .

What sample size would be required to obtain a margin of error of M days?

This is n for the given value of M. So

$M = z\frac{\sigma}{\sqrt{n}}$

$M = 1.96\frac{6.84}{\sqrt{n}}$

$M\sqrt{n} = 1.96*6.84$

$\sqrt{n} = \frac{1.96*6.84}{M}$

$(\sqrt{n})^2 = (\frac{1.96*6.84}{M})^2$

$n = (\frac{1.96*6.84}{M})^2$

The sample size required is $n = (\frac{1.96*6.84}{M})^2$ , in which M is the desired margin of error. If n is a decimal number, it is rounded up to the next integer.

8 0

3 years ago

There are 70,000 bacteria present in a culture. An antibiotic is introduced to the culture and the number of bacteria is reduced

leonid [27]

Answer:

The question is an incomplete question

8 0

2 years ago

How do I solve this 3-7+2-[13-17-1.3]+5

dusya [7]

Answer:

8.3

Step-by-step explanation:

do whats in the brackets first.

13-17-1.3= -5.3

rewrite the equation

3-7+2-[-5.3]+5

3-7+2= -2

rewrite the equation

-2-[-5.3]+5

when 2 negative signs are together u change it to a positive sign.

rewrite the equation

-2+5.3+5

-2+5.3= 3.3

rewrite the equation

3.3+5=8.3

8 0

3 years ago

An automobile company manufactures hatchbacks, sedans, and sports cars. The company conducted a magazine survey to determine the

Lerok [7]

If we sum up or total the given percentages, it will give us 100%. The number of cars being sedan which the company should manufacture must be equal to the 15,000 cars per month times the percentage of sedans.
sedan cars = (15,000 cars/month) x (0.19) = 2850 cars/ month
Thus, out of the 15,000 cars that the company is planning to manufacture, 2,850 of which should be sedan.

6 0

3 years ago