# Tutor profile: Anitesh B.

## Questions

### Subject: Basic Math

If the circumference of a circle is 36 meters, what is its radius?

First, the formula for the circumference of a circle is 2*pi*radius. Because the question states that the circumference of the circle is 36 meters, then we can set up the following equation: 2*pi*radius = 36. Pi is a constant and we can approximate its value to be 3.14. Thus, 2*3.14*radius = 36. Solving for the radius, we can see that radius = 36 / (2*3.14) after dividing both sides by 2*3.14 . We can solve this equation by multiplying 2*3.14 first since it is in parentheses and we get 36/6.28. This equals 5.73 meters and therefore the radius of this circle is 5.73 meters.

### Subject: Chemistry

What are noble gases and how do they react?

Noble gases are located on the rightmost column of the periodic table and include elements like Neon, Argon, and Krypton. Noble gases are stable compounds that have 8 electrons in their valence shells, which means that they have a full valence shell. In other words, because these elements have 8 electrons, they do not have a need to exchange electrons with other atoms and thus are not reactive. A guiding principle, called the Octet Rule, encompasses this phenomenon and states that 8 electrons in a valence shell completely fill that outermost electron level and elements tend to achieve this through chemical reactions.

### Subject: Biology

Why are enzymes so important?

Enzymes are biological catalysts that help speed up reactions. For humans, this means that without enzymes many life-supporting reactions like metabolic reactions would not proceed quickly enough to sustain our everyday lives. For instance, in cellular respiration (glycolysis, Krebs Cycle, Electron Transport Chain), the regulation of enzymes is of the utmost importance as it dictates the energy levels in the body.