Find the coefficient of x^2 in the expansion of (2x - 1)^5.

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Find the area of a parallelogram with base 15 yards and height 21 2/3

Ebuka's monthly rent is $750. if ebuka pays the rent late, his landlord charges 4% interest per week that the payment is late. write a function that gives the total cost r(t), in dollars, of ebuka's rent if he pays it t weeks late.