Midbrain. The midbrain, also called the mesencephalon, is a small region of the brain that serves as a relay center for visual, auditory, and motor system information. It regulates autonomic functions, those that the body carries out without conscious thought, such as digestion, heart rate, and breathing rate.
A rational number is one that can be expressed as a fraction (or ratio), e.g. 1/3. There are fractions that are near Pi, for example: 22/7 = â¦ 3.142857 (PI = 3.14159265...) A closer fraction is: 355/113 = 3.14159292 However whatever fraction you have, you will never get exactly PI.
A number that can be made by dividing two integers. (Note: integers have no fractions.) The word comes from ratio. Examples: â¢ 1/2 is a rational number (1 divided by 2, or the ratio of 1 to 2) â¢ 0.75 is a rational number (3/4) â¢ 1 is a rational number (1/1) â¢ 2 is a rational number (2/1) â¢ 2.12 is a rational number (212/100) â¢ â6.6 is a rational number (â66/10) But Pi is not a rational number, it is an Irrational Number.