3 years ago

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Mathematics

2 answers:

vichka [17]3 years ago

5 0

Answer is A because yes

olganol [36]3 years ago

3 0

The answer is: A because

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Mean birthweight is studied because low birthweight is an indicator of infant mortality. A study of babies in Norway published i

ANEK [815]

Answer: 20

Step-by-step explanation:

Formula to find the minimum sample size(n) when prior population standard deviation $(\sigma)$ is known.

$n=(\dfrac{z^c\times\sigma}{E})^2$ , where E = Margin of error , $z^c$ = Critical z-value for c confidence interval.

Given : E = 225 g , $\sigma=600$ g

Critical z value for 90% confidence = 1.645

Now, $n=(\dfrac{1.645\times600}{225})^2$

$n=(\dfrac{987}{225})^2$

$n=(4.38666666667)^2=19.2428444\approx20$

Hence, the required minimum sample size = 20

7 0

3 years ago

An open box will be made from a rectangular piece of cardboard that is 8 in. by 10 in. The box will be cut on the dashed red lin

NeX [460]

Hi! Sorry, it would've taken too long to type out, so I wrote it and have the attachment. Good luck!

4 0

3 years ago

Six lines are drawn in the coordinate plane below.

Simora [160]

Answer:

Step-by-step explanation:

they are all going down while the others rise

5 0

3 years ago

Maria needs 3.87 feet of string to use as a border for her poster. Maria finds two pieces of string one that is 2.5 feet long an

lukranit [14]

Answer:x = 4.25 - 3.87 x = 0.38 feet

Step-by-step explanation::Find out the how much string will Mellisa have left over .To proveLet us assume that the string will Mellisa have left over be x .As givenMelissa needs 3.87 feet of string to use as a border for her poster.Melissa finds a piece of string that is 4.25 feet long.Than the equation is write in the form. Therefore the string will Mellisa have left over be 0.38 feet .

4 0

3 years ago

How do I set this up?

eimsori [14]

So find out Y first with the equation 2y+6=8y-102 which is y=18

Then plug in y for 8y-102 which is 42

Finally make the equation 3x+42=180 to find x which is 46

8 0

4 years ago