Estimation helps when there’s a lot of decimals or you want to get the basic number. For an example if you wanted to count the basic population of an area you wouldn’t say 15,347 people you would say over 15,000 people. Hope this helps!
First subtract manny value 36.5 from Evan values 18 which will give u 18.5 cm which then u have to convert. Since 1 cm is about .4, we can multiply 18.5 by .4 to get the answer 7.4 inches
