Necesito ayuda con una Integral por sustitución trigonométrica, Por favor!

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

The volume of a cube is 8 in to the 3rd power. how long is each side?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup