I would like to give the acknowledgements for the following:

First,

**Jesus Christ**, because He gave me this nice talent. As a Mathematician, I would like to help other people around the world who has a problem in Mathematics through my website. I know that Mathematics is useful anywhere in everyday life.

Second, my mother, Rosario Magtalas Balajadia, who became my first teacher and tutor during my Preschool, Kindergarten, and Elementary days. She was helping and guiding me in studying Mathematics especially the Arithmetic.

Third, Andres Bonifacio Elementary School in Sangandaan, Caloocan City, Philippines where I studied and finished Preschool and Kindergarten in 1977.

- Mrs. Fe Manalo, my teacher in Preschool and Kindergarten.

Fourth, University of the East Caloocan Campus in Caloocan City, Philippines where I studied and finished Elementary (Grade 1 to Grade 2) in 1979.

- Ms. Consuelo C. dela Fuente, my Math teacher in Grade 1. She was also my home tutor.

- Mrs. Leonora L. de Guzman, my Math teacher in Grade 2.

Fifth, La Consolacion School in Caloocan City, Philippines where I studied and finished Elementary (Grade 3 to Grade 6) in 1983.

- Mrs. Isabel Espaldon, my Math teacher in Grade 3.

- Mrs. Corazon Gabriel, my Math teacher in Grade 4.

- Ms. Divina Danting, my Math teacher in Grade 5.

- Mrs. Mercedes T. Ching, my Math teacher in Grade 6.

Sixth, Mapua Institute of Technology in Santa Cruz, Manila, Philippines where I studied and finished High School in 1987.

- Ms. Angelita de Jesus, my teacher at Mathematics 1 (General Math).

- Mr. Severino Laguardia, my teacher at Pre-Engineering Math 1 (Algebra).

- Mrs. Sarah Chin, my teacher at Mathematics 2 (Algebra) and Mathematics 3 (Plane Geometry).

- Mr. Egmidio Pilar, my teacher at Pre-Engineering Math 2 (Statistics).

- Mr. Leoncio G. Esteban, my teacher at Pre-Engineering Math 3 (Solid Geometry).

- Mrs. Teresita R. Bautista, my teacher at Mathematics 4 (Trigonometry).

- Ms. Rosita F. Dizon, my teacher at Pre-Engineering Math 4 (Advanced Algebra).

Seventh, Mapua Institute of Technology in Intramuros, Manila, Philippines where I studied and finished Bachelor of Science in Chemical Engineering in 1992.

- Mrs. Dionisia Maunahan Lanuza, my professor in Algebra.

- Mrs. Jovita Nava, my professor in Trigonometry.

- Mr. Geraldo Augusto, my professor in Solid Geometry.

- Mrs. Rosario Jose (former Mrs. Cunanan), my professor in Analytic Geometry.

- Mrs. Denisia Avelino Villaos, my professor in Differential Calculus.

- Mrs. Ellen Gozum Bernardino, my professor in Integral Calculus.

- Mr. Nelson C. del Rosario, my professor in Differential Equations.

- Dr. Ellen C. San Nicolas-Salac, my professor in Chemical Engineering Math.

- Mrs. Peachy Valenzuela, my professor in Mechanics.

- Dean Rogelio C. Supan, my professor in Strength of Materials.

- Mrs. Marijo Abaquin Angeles, my professor in Chemical Engineering Statistics.

Eight, De La Salle University in Malate, Manila, Philippines where I studied Master of Science in Chemical Engineering in 2000 (thesis not completed).