48 miles per hour! Just double 30 minutes to get an hour, and double 24 as well which equals 48.
Average rate of change of f(x) from x = 1 to x = 4 represents the average speed with which the water is falling between the first second and the fourth second.
The answer is B) 11+2i
When you remove the parentheses you add the 5+6=11 then add the -3i+5i=2i
The answer is a unit rate