Find the central angle in degrees of an arc of 2000 km on the surface of a planet if the radius of the planet is 2439 km. the central angle is approximately degrees *round to the nearest tenth as needed*

Central Angle (radians) = Arc Length / radius
Central Angle (radians) = 2,000 / 2,439
Central Angle (radians) = 0.8200082001
Central Angle (degrees) = 0.8200082001 * 57.2957795130823
= 46.9830090308 degrees rounded to nearest tenth =
47.0 degrees

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.