Chinese New Year SMS Contest

Scientific notation is expressed in the form of a× 10 n, where1≤| a |10, where n is an integer. When determining the value of n, it depends on how many digits the decimal point has moved when the original number becomes a, and the absolute value of n is the same as that of the decimal point. When the absolute value of the original number is greater than 1, n when the absolute value of the original number is less than 1, n is negative. 4 1430 is expressed by scientific counting method, so B.