You know the distance between two cities is 140 miles. What is the distance in kilometers?
2 answers:
Answer:
225.302 km.
Step-by-step explanation:
Given :The distance between two cities is 140 miles.
To Find: What is the distance in kilometers?
Solution:
The distance between two cities = 140 miles
1 mile = 1.6093 km
140 miles =
=
The distance between two cities in km = 225.302 km
Hence the distance in kilometers is 225.302 km.
So, Option C is true .
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so. .if you look at the picture below... we can simply use tangent
keeping in mind that, as the plane moves up and up, the angle is "constant", is never changing, whilst "y" and "x" and even "r" are changing, but we're not using "r" in this case.... we know what dx/dt is, we know the angle is a constant, this matters because the derivative of a constant is just 0
so, we really just need to find dy/dt then, because whilst dx/dt is telling us how fast is moving horizontally, dy/dt is telling us how long it took to cover those 10,000 feet
thus
once you find what dy/dt is... you can simply do a quick conversion for the 10,000 feet, to see how many minutes it took
the plane is going at a speed of 22,000 per minute, namely, dx/dt = 22,000
so. .if you look at the picture below... we can simply use tangent
keeping in mind that, as the plane moves up and up, the angle is "constant", is never changing, whilst "y" and "x" and even "r" are changing, but we're not using "r" in this case.... we know what dx/dt is, we know the angle is a constant, this matters because the derivative of a constant is just 0
so, we really just need to find dy/dt then, because whilst dx/dt is telling us how fast is moving horizontally, dy/dt is telling us how long it took to cover those 10,000 feet
thus
once you find what dy/dt is... you can simply do a quick conversion for the 10,000 feet, to see how many minutes it took