## Prealgebra (7th Edition)

Multiplying two negative factors yields a positive product. Since the first factor has 2 decimal places and the second has 1 decimal place, the product has 3 decimal places. $\ \ \ -\overset2{\overset47}.\overset1{\overset28}4$ $\underline{\times-\ \ 3.5}$ $\ \ \ \ \ \ \overset13.920$ $\underline{\ \ \ \ 23.520}$ $\ \ \ \ 27.440$ Trailing zeroes to the right of the decimal are dropped.