The Hindus in India were the first use as a placeholder. .
O letters
zero
O calculus
scientific theories

Ineed extreme for task 2. my student number is 571721. many to whoever solves this correctly, im in debt to you.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?