PLEEEEEAAAAAASEEEEE HELLLPPPPPP!!! 20 POINTS!!!!<br><br> list question number then answer

a shop owner offered a 25% discount off the regular price of a picture frame the amount of the discount is 4$ what is the regula

guajiro [1.7K]

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5 0

2 years ago

Write as a decimal<br> A) 407 tenths <br> B) 209 hundredths

castortr0y [4]

Answer:- A) 407 tenths =40.7

B) 209 hundredths=2.09

Explanation:-

We know that one tenth $=\frac{1}{10}$ and one hundredth $=\frac{1}{100}$

A) 407 tenths

$=\frac{407}{10}=40.7$

Thus decimal form of 407 tenths is 40.7.

B) 209 hundredths

$=\frac{209}{100}=2.09$

Thus decimal form of 209 hundredth is 2.09.

4 0

2 years ago

Read 2 more answers

A doctor at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she

Nataly_w [17]

Answer:

The minimum sample size needed is $n = (\frac{1.96\sqrt{\sigma}}{4})^2$ . If n is a decimal number, it is rounded up to the next integer. $\sigma$ is the standard deviation of the population.

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:

$\alpha = \frac{1 - 0.9}{2} = 0.05$

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 $1 - 0.05 = 0.95$ , so Z = 1.645.

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.

How large a sample must she select if she desires to be 90% confident that her estimate is within 4 ounces of the true mean?

A sample of n is needed, and n is found when M = 4. So

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

$4 = 1.96\frac{\sigma}{\sqrt{n}}$

$4\sqrt{n} = 1.96\sqrt{\sigma}$

$\sqrt{n} = \frac{1.96\sqrt{\sigma}}{4}$

$(\sqrt{n})^2 = (\frac{1.96\sqrt{\sigma}}{4})^2$

$n = (\frac{1.96\sqrt{\sigma}}{4})^2$

The minimum sample size needed is $n = (\frac{1.96\sqrt{\sigma}}{4})^2$ . If n is a decimal number, it is rounded up to the next integer. $\sigma$ is the standard deviation of the population.

4 0

3 years ago

Which is the place value of the 1 in the number 184,735?

malfutka [58]

The place value of 1 is hundred thousands.

5 0

2 years ago

Read 2 more answers

(a) It takes 73 pounds of seed to completely plant a 10-acre field. How many pounds of seed are needed per acre? (b) Latoya boug

Snezhnost [94]

(a) 7.3 pounds of seed is needed per acre.

5 0

3 years ago

PLEEEEEAAAAAASEEEEE HELLLPPPPPP!!! 20 POINTS!!!! list question number then answer