Google what is 2 and 5/6 as a decimal

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?

What is the range of the inverse of the given function f(x)=√x-2