Find the value of ab when a = 9/11
and b =
7/10
The answer is
(Simplify your answer.)

What is the absolute value of the complex number -4-sqrt2i

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

(10. in the figure, a aabc is drawn tocircumscribe a circle of radius 3 cm ,such thatthe segments bd and dc are respectively oflength 6 cm and 9 cm. find the length ofsides ab and ac.