1. squaring
2. four triangles and the square with side length "c"
3. big square (side length: a+b)
40% of 50 is 20. So, 20/50 students who take the random sample prefer chocolate over vanilla ice cream. In order to find the number of students who prefer chocolate over vanilla ice cream out of 200 students in total, it is best to set up a proportion. Here: 20/50=x/200. Once you solve the proportion you will get x as 80.
Hope the explanation helped!
well, we can say that 1 hour is 100%, what is 2/5 hr off of it in percentage?
Here they are:
36,16,81,64
It simplifies to 1/383 or .00261
Hope that helps