Final Answer:
The digit found at the 1st decimal place of Pi is B. 4.
Explanation:
Pi is an irrational number, approximately equal to 3.14159... and so on, with its decimal places extending infinitely without a repeating pattern. The first decimal place after the integer part (3) is the digit that appears immediately after the decimal point. In the case of Pi, the digit at the 1st decimal place is 4.
The value of Pi is commonly rounded to 3.14 for practical purposes, but for precise calculations or investigations, its decimal expansion is considered. The "1st decimal place" refers to the digit following the decimal point, which in Pi's case is 3.14159... where 4 is the digit at the 1st decimal place.
Understanding Pi's decimal expansion is crucial in various mathematical and scientific applications. Its infinite and non-repeating nature makes it a fundamental and intriguing constant in mathematics, utilized in diverse fields ranging from geometry and trigonometry to physics and engineering. While the value of Pi is often approximated, its exact nature, including the digit at any given decimal place, contributes to the precision required in various scientific computations and theories.