Totsaken sold half of his comic books and bought ten more. he now has 40. with how many did he begin?

The answer is 60 because

40-10*2=60

hope it helps

Okay, so first off, take ten away from 40. That gives you 30. Then, if you double that, it gives you 60. So, you can do half of 60 to get 30, and then add ten to get 40. So, he began with 60.

Area of circle = pi * radius^2radius is given to be 1/2 inchespi * (1/2)^2 = pi/4 inches^2 = 0.785 inches^2