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Kay [80]
3 years ago
6

Earth revolves on its axis once every 24 hours. Which statement are true ? Check all that apply

Mathematics
1 answer:
zhuklara [117]3 years ago
3 0

Answer:

The angular velocity of Earth is π/12 radians per hour.

The angular velocity of Earth is 2π radians per day.

Step-by-step explanation:

A full circumference of a circle (as the Equator line on Earth) is 2π radians.

Since the planet does a full revolution in 24 hours... that means it makes a full turn in a day.

So, we can see that in a day, the planet rotates 360 degrees... or 2π radians per day!

Now, if you want to find the angular velocity per HOUR... you divide that by 24... so  2π/24 = π/12 radians

So, we can also say it does π/12 radians per hour.

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A marine biologist wants to test the effect of water temperature on the length of time sea otters can remain under water during
atroni [7]

Answer:

0.4216

Step-by-step explanation:

from the data given The estimate of the standard deviation of the sampling distribution of b,

( The slope of the sample regression line for the relationship )

= 0.4216  (  i.e. intersection of SE coef and water temperature )

Testing the effect of water temperature on the length of time sea otters can remain

5 0
3 years ago
Bill and jenna are solving the quadratic equation x 2 - x = 12. bill solved this way jenna solved this way x 2 - x = 12 x(x - 1)
goldfiish [28.3K]

Jenna is correct and Billy is wrong because the equation was not converted to a quadratic form.

<h3>Form of quadratic equation</h3>

The form of quadratic equations is given as

ax2 + bx + c = 0

So, for the quadratic equation, we have

x² - x = 12

Let's make it into quadratic form

x² - x - 12 = 0

Bill solved it as

x(x - 1) = 12

This is wrong, because quadratic equations must be written in the form before solving for the variables

Jenna solved it as

x 2 - x - 12 = 0

Jenna is correct because she converted the equation to a quadratic form before solving for the variables.

Thus, Jenna is correct and Billy is wrong because the equation was not converted to a quadratic form.

Learn more about quadratic equations here:

brainly.com/question/7784687

#SPJ1

6 0
2 years ago
How many birds fly south every year?
Paraphin [41]

Answer:

I believe it is 4 billion

Step-by-step explanation:

Hope I helped!

5 0
3 years ago
Which fractions are greater than -5/12 ? Choose exactly two answers that are correct.
Elis [28]
B is the answer because when you find the common denominator. B will turn into -9/24 and -5/12 is going to be  -10/12
~JZ
5 0
4 years ago
3 times a number plus 12 minus 5 times the same number
telo118 [61]
3x + 12 - 5x = 22

-2x + 12 = 22
-2x = 22-12
-2x = 10

x = -5

hope this helps
5 0
3 years ago
Read 2 more answers
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