What does 1.23 + 45.6 equal? 46.9 o 47 o 46.8 o 46.83

The correct option is: 46.83

Explanation:

Addition is defined as the sum or total of all the given numbers. It is one of the four arithmetic operations in mathematics and is denoted by the plus symbol (+). The sum of all the numbers is expressed by an equality sign (=).

Therefore, 1.23 + 45.6 = 46.83 , having four non-zero significant figures.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).