The students asked their math teacher to tell them her age. she didn't want to tell them, but she replied, "if you take two years from my present age the result will be three times my son's age, and seven years ago my age was twice what his will be in two years." how old is the teacher

the correct answer is the following is a list of inventions made in the medieval islamic world, especially during the "islamic golden age" (8th to 13th centuries),[1][2] as well as the late medieval period, especially in the emirate of granada and the ottoman empire.

science and technology in the islamic world adopted and preserved knowledge and technologies from contemporary and earlier civilizations, including persia, india, china, and greece-roman antiquity, while making a number of improvements and innovations.