Radius of the circle $\"\"$ miles.

Circumference is $\"\"$ .

$\"\"$ miles.

Since the circumference makes one rotation every 24 hours, the point has a linear velocity of $\"\"$ mph.

Therefore, the linear speed on the surface of Earth at $\"\"$ north latitude is 794 mph.

The linear speed on the surface of Earth at $\"\"$ north latitude is 794 mph.