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sattari [20]
3 years ago
9

What is the estimated age of Earth?

Mathematics
2 answers:
Studentka2010 [4]3 years ago
8 0

Answer:

4.54 billion years

Step-by-step explanation:

Scientists use the layers of rock of the Earth's crust/core to estimate how old is the earth.

Serhud [2]3 years ago
6 0

Answer:

4.543 billion years i think, i apologize if im wrong

Step-by-step explanation:

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Step-by-step explanation:

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Compute using long division: 1,234÷68
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Answer:

Quotient = 18

Remainder = 10

Step-by-step explanation:

1234/68

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3 years ago
The height, h, in feet of a ball above the ground is given by h = −16t2 + 64t + 80, where t is the time in seconds. How long doe
Gwar [14]

Answer:

t = 5 seconds

Step-by-step explanation:

It is given that, the height h, in feet of a ball above the ground is given by :

h=-16t^2+64t+80

Where t is in seconds

We need to find how long does it take the ball to hit the ground? When it hits the ground, its height will be equal to 0. So,

-16t^2+64t+80=0\\\\t=\dfrac{-64\pm \sqrt{(64)^2-4\times (-16)(80)} }{2\times -16}\\\\t=\dfrac{-64+ \sqrt{(64)^2-4\times (-16)(80)} }{2\times -16},\dfrac{-64-\sqrt{(64)^2-4\times (-16)(80)} }{2\times -16}\\\\t=-1\ s\ \text{and}\ t=5\ s

Neglecting negative time.

It means ball will take 5 seconds to hit the ground.

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2 years ago
How to write a book report plz help???​
nlexa [21]

Answer:

below

Step-by-step explanation:

In short, a book report is an essay that contains what you read and learned from reading a book. For example, you would write a book report in the following sequence:

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Best of Luck!

3 0
2 years ago
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