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3 years ago

Help me please I am confused

Mathematics

1 answer:

vivado [14]3 years ago

5 0

It’s such a weird question but you can always state the formula is length times width. with 2,3,and 4 being the length and a being the width.

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Here are summary statistics for randomly selected weights of newborn girls: n=185,

Anna11 [10]

Answer:

The confidence interval for the population mean μ is $32.487$

Step-by-step explanation:

Given :

Number of weights of newborn girls n=185.

Mean $\bar{x}=31.4$ hg

Standard deviation s=7.5 hg

Use a 95% confidence level i.e. cl=0.95

To find : What is the confidence interval for the population mean μ?

Solution :

Using t-distribution,

The degree of freedom $DF=n-1=185-1=184$

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

$\alpha=0.025$

The t critical value is t=1.973.

The confidence interval build is

$CI=\bar{x}\pm(t\cdot \frac{s}{\sqrt{n}})$

Substitute the values,

$CI=31.4\pm(1.973\cdot \frac{7.5}{\sqrt{185}})$

$CI=31.4\pm(1.973\cdot 0.5514)$

$CI=31.4\pm(1.087)$

$31.4+1.087$

$32.487$

Therefore, the confidence interval for the population mean μ is $32.487$

6 0

3 years ago

9x2(^)+24x+20=4 trying to solve the quadratic equation by factoring

ser-zykov [4K]

Answer:

Step-by-step explanation:

9x^2 + 24x + 16 = 0

(3x + 4)(3x+4)=0

3x + 4 = 0

3x = -4

x = -4/3

3x + 4 = 0

3x = -4

x = -4/3

6 0

3 years ago

The polygons in each pair are similar. find the missing side length

pochemuha

If both are similar ratio of sides will be same

$\\ \sf\longmapsto \frac{x}{25} = \frac{7}{5} \\ \\ \sf\longmapsto 5x = 7 \times 25 \\ \\ \sf\longmapsto 5x = 175 \\ \\ \sf\longmapsto x = \frac{175}{5} \\ \\ \sf\longmapsto x = 35$

6 0

3 years ago

A card is selected at random from a deck of 52 playing cards, the probability that a card 2 is selected will be ______________.

kkurt [141]

Answer:

b) 4/52

Step-by-step explanation:

Since there are only 4 playing cards in a full deck that are labeled '2', and there are 52 cards in total - then there is a 4 out of 52 chance that a '2' card will be selected!

8 0

3 years ago

Read 2 more answers

What is $3.85 + $3.06 + $2.79 in estimate

8_murik_8 [283]

It is about $10

round $3.85 to $4

round $3.06 to $3

round $2.79 to $3

add them together $4+$3+$3=$10

6 0

3 years ago