Recently published items

Solving $\log(y)+\log(x)=\frac{1}{n}\log(ay^n)$ for $x$, where $a$ and $n$ are positive integers.

Given the exchange rate between two currencies, calculate how much of one currency you will get for $x$ amount of the other

Given x and y, calculate (x-y) as a percentage of y.  Chemistry context.

Calculating a salesperson's income based on years of service and commission from sales

Finding $x$ from a logarithmic equation of the form $\log_a\left(\frac{1}{x}\right) = b$, where $a$ is a positive integer and $b$ is a negative integer.

Given a discrete random variable (as a formula) calculate:
E(X), Var, std dev, cumulative distribution and probabilties.

Calculate P(A|B) given a two way table.

Calculate P(A|B) given a Venn diagram.

Calculating probability from a given Venn diagram.  Includes complement, union, intersection.

Given the exchange rate between two currencies and the bank's commission rate, calculate how much of one currency you will get for $x$ amount of the other