In a year, the united states consumes about 146,000,000,000 gallons of gasoline. express this number in scientific notation.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

Which expression is not a polynomial?