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Alexeev081 [22]

3 years ago

7

To what organ does the umbilical vein lead

1 answer:

Romashka [77]3 years ago

6 0

The umbilical vein connects the placenta of the mother to the growing fetus's opening of the stomach. This cord connects the baby to its mother. Its primary function is to carry oxygenated blood to the fetus. <span>The average cord is about 50cm (20 inches) long.</span>

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A mass extinction is technically defined as an event were at least ____% of all genera (families of organisms) goes extinct.

Alecsey [184]

75% species go extinct to be considered a mass extinction

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2 years ago

On a certain day, Donnie observes the wind is blowing at 2 miles per hour. A bird nesting near Donnie's house flies three quarte

kipiarov [429]

Answer:

Air speed of bird is $4.17$ mph

Explanation:

let the speed of the bird in still air be "X"

Speed of the bird when it flies in the direction of flow of wind $= X+2$

Speed of the bird when it flies in the opposite direction of flow of wind $= X-2$

The total time taken is equal to $12$ minutes

$= \frac{12}{60} \\= \frac{1}{5}$ hours

The distance in miles is equal to $\frac{3}{4}$ $= 0.75$ miles

$\frac{0.75}{X+2} + \frac{0.75}{X-2} = \frac{1}{5}$

On solving the above equation, we get -

$2 X = (X^2 -4)*\frac{1}{0.75 *5} \\X^2 -4 -0.75 X =0\\X = 4.17$

Air speed of bird is $4.17$ mph

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4 years ago

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3 years ago

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4 years ago

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3 years ago

Read 2 more answers