Michael Sanchez purchased a condominium for $88,000. He made a 20% down payment, and financed the balance with a 30-year, 9% fixed rate mortgage. What is the amount of the monthly principal and interest portion, PI, of Michael's loan?

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0