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3 years ago

Help please I’m not sure if this is right

Mathematics

1 answer:

Schach [20]3 years ago

6 0

Answer:

PERFECT

YOU GOTTA RIGHT

Step-by-step explanation:

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Quelle est la hauteur de trapèze? <br> what is the height of trapezoid?

Triss [41]

Answer:

the hight is 3

Step-by-step explanation:

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3 years ago

Find an ordered pair (x,y) that is solution to the equation x-3y=9

Rashid [163]

(0,-3) , (9,0) , (12,1)

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3 years ago

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

inessss [21]

The lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation of 15 days.

That is,

Consider X be the length of the pregnancy

Mean and standard deviation of the length of the pregnancy.

Mean $\mu =266\\$

Standard deviation \sigma =15

For part (a) , to find the probability of a pregnancy lasting 308 days or longer:

That is, to find $P(X\geq 308)$

Using normal distribution,

$z=\frac{X-\mu}{\sigma}$

$z=\frac{308-266}{15}$

$=\frac{42}{15}$

Thus $z=2.8$

So $P\left (X\geq 308 \right )=1-P(X$

$=1-P(z$

$=1-Table\: value\: of\: 2.8$

$=1-0.99744$

$=0.00256$

Thus the probability of a pregnancy lasting 308 days or longer is given by 0.00256.

This the answer for part(a): 0.00256

For part(b), to find the length that separates premature babies from those who are not premature.

Given that the length of pregnancy is in the lowest 3%.

The z-value for the lowest of 3% is -1.8808

Then $X=\frac{X-\mu}{\sigma}\Rightarrow X=z*\sigma+\mu$

This implies $X=-1.8808*15+266=237.788$

Thus the babies who are born on or before 238 days are considered to be premature.

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3 years ago

C.) Apple offers a buyback program for iPhones after they are 5 years old. They

max2010maxim [7]

Answer: It would not be profitable to sell it back for 100$.

Step-by-step explanation:

It would not be profitable because you might have payed 300-1000$ (Depending what phone you buy) for your phone. It would only be profitable for the older generation of the phones like iPhone 5 and iPhone 6.

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3 years ago

Which of the following describes the image of a square after a dilation that has a

Misha Larkins [42]

C. Its sides are 6 times as long as that of the original square is the answer.

<u>Step-by-step explanation:</u>

Dilation is a kind of transformation which modifies the image size. The scale factor, otherwise called as scalar factor, means how much smaller or larger the image is. Whether the image is expanding or shrinking, the shape is retained.

In the process of dilation, we have to multiply the proportions of original image by the scale factor to find the size of an image. If the scalar factor is saying 6, then the image is inflated so its sizes are 6 times the original image.

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4 years ago