Please choose the correct answer,
2 answers:
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Answer:
The correct answer is 0.0667 centimeters.
Step-by-step explanation:
Diameter of earth is 12700 kilometers.
Width of the solidified ocean crust is 35 kilometers.
Ratio between the diameter of the earth and the solidified crust is .
Now the earth is shrunken to a size of a basketball with the diameter as 24.2 centimeters. Let the thickness of the Earth's crust in this model be x centimeters.
Ratio between the diameter of the model earth and the solidified crust is .
But this ratio of the real Earth and its model must be equal.
∴ =
⇒ x = 0.0667 centimeters.
Whenever you're interested in computing the (absolute) difference between two values of a certain variable, you have to subtract the final value and the initial value. This is often written as delta:
So, in this case, the final temperature is -30°F. The initial temperature is 115°F. So, the variation is
A negative delta indicates that the value decreased, which is our case.