Estimate the area of the following irregular shapes

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

Find the roots of the polynomial function f(x) = x^3 + 2x^2 + x

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax