I forgot the formula and my calculator! – No worry. Why? Because INVBAT.COM is making formula and calculator easy to find and use anytime and anywhere using your smartphone, tablet, laptop or desktop computer. Show me how to search for formula and calculator. Click search shown below

## History of INVBAT.COM

INVBAT.COM was created by Apolinario “Sam” Ortega, currently working at Salt River Project (SRP), a community-based, nonprofit utility and one of the nation’s largest public power utilities in Phoenix, Arizona, USA. He works at Electrical Engineering and Asset Optimization department. In his free time at home, he is passionate in pursuing INVBAT.COM since 2009.

He observed that his brain memory recall of mathematical formulas and equation is no longer within five minutes, his personal time limit. So he asked himself these two questions, “What are the available tools that I can use to help me retrieve formulas and equations within five minutes anytime and anywhere? Is it possible to combine calculator and formula so I can get an answer within one minute? “. His answer is to use the internet to solve the problem of anytime and anywhere. Next he learned the language of internet such as CSS, HTML, HTML5, and JAVASCRIPT to solve his second problem, combining calculator and formula to get an answer within one minute. Then he subscribes to Yahoo web hosting service since April 27, 2009 to implement his solution. Now INVBAT.COM is migrating to Amazon Web Service EC2, cloud technology in order to serve the growing number of public users.

Sam Ortega is now confident that he can remember mathematical formulas and equations that he created in INVBAT.COM within five minutes to help him do engineering analysis, design review, and make recommendation. He believes science, technology, engineering, arts, and mathematics (S.T.E.A.M) students, teachers, and employees worldwide will also need help to remember their own formulas and equations. He sees a business opportunity for creating customize calculator with embedded formula for other colleagues in S.T.E.A.M to help them have their own personal formula and calculator website. So he created his online formula and calculator (ofc) store, ofc.host , to manage the order and payment processing for students, teachers, and employees who need help to create their own personal formula and calculator website.

## Vision of INVBAT.COM

INVBAT.COM’s vision is to see more than 3.2 billion people worldwide such as students, working adults, technicians, teachers, instructors, professors, engineers, scientists, and business people who found themselves forgetting mathematical formulas and equation to less likely to say , ” I forgot the mathematical formulas or equation and also I don’t have my scientific calculator available on hand to solve the problem.”

Today’s advancement in internet, smartphone, tablet, laptop, cloud technology, deep learning, and artificial intelligence made it possible to have formulas and scientific calculators available in our hands on demand anytime and anywhere.

## Formula and Calculator

### Geometric Mean

Give me an example where this computational knowledge on how to calculate geometric mean distance is used in actual work. Answer no. 1 – It is use in transmission tower design calculation.

### Matrix 4 x 4

Give me an example where this computational knowledge on how to calculate the determinant of 4 x 4 matrix is used in actual work.

### Matrix 3 x 3

Give me an example where this computational knowledge on how to calculate the determinant of 3 x 3 matrix is used in actual work.

## Contact

For inquiry about your personal formula and calculator website order, we provided three e-mail addresses so we can response quickly. Thank you for your feedback and inquiry.

e-mail to: admin@invbat.com

e-mail to: admin@invbat.biz

e-mail to: samxcl@yahoo.com