Scientific notation and significant figures

For numbers less than $1$, the number of zeros appear in the exponent as a negative number.

For numbers greater than $1$, the number of digits between the first digit and the decimal point appear in the exponent as a positive number.

Do not use computer notations such as $7.45\text{E}-3$ or $1.8\text{E}5$ on assessments.

The number of significant figures a number has is the number of digits in the scientific notation. This means $2.07 \times 10^5$ has three significant figures, but $2.070 \times 10^5$ has four.

When using a calculator, store all intermediate values on the calculator, with ANS or a letter storage, then round the final answer correct to at least three correct significant figures. The answer does not need to be in scientific notation.

Unless specified otherwise, all given quantities in problems have an infinite number of significant figures. This means in math, you are not expected to propagate significant figures.

If the answer can only be an integer, such as the quantity of some items, $n$ in SL binomial distribution, the number of compounding periods in compound interest; or an exact number (like $\frac\pi3$), then report the answer in full.