Please help ASAP!! ill give brainiest :)

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

One astronomical unit (1 au) is about 1.496 alt tag missing. kilometers. if you wrote this number of kilometers in regular decimal notation (for example, 528 and 3,459 are written in regular decimal notation), how many zeros would your number have?

Awindow washer cleans 42 windows in 2 hours. at this rate, how many windows did he clean in 180 minutes.