The tutor shares a discovery about the Casio fx-260Solar. The Casio fx-260Solar is a great calculator. Of course, it’s reverse entry for square root, sin, cos, tan, etc, so might be a little less popular with some people. When you …
Math: Calculator usage: brackets on the Casio fx-260Solar Read more »
The tutor shows an example of the matched pairs t-test. In my post from Dec 11 I began about the matched pairs t-test. It’s used to determine if two samples come from the same population. In my previous post I …
The tutor tells how to convert an angle from degrees to rads, or back, on various Sharps. On the Sharps I know, there is a button that has DRG above it. Pressing 2ndF, then that key, toggles the user between …
Math: trig: converting between degrees and rads on Sharp calculators Read more »
The tutor shows an example of how to price a bond. Example: Imagine the following scenario: a 20-yr $10K bond pays at 4% per year, compounded and paid semi-annually. However, realizing a present interest rate of only about 2.5%, a …
Math of finance: bond pricing, featuring the TI BA-35 Read more »
The tutor shares a bit of calculator maintenance. The TI-30XA uses two cells. The ones I took out of mine say GPA76. I replaced them with AG13 cells; the calculator seems to work fine. The back of the TI-30XA has …
Calculator Usage: changing the cells of the TI-30XA Read more »
The tutor tells the quick way to convert the accumulated balance after regular deposits between “beginning” vs “end of month” payments. In a previous post I tell how to find the end balance of an account after five years of …
The tutor shows how to find the balance of a savings account after monthly deposits over a period of years, using the Texas Instruments BA-35. Example: $100 is deposited into a savings account each month for five years. If the …
Financial calculators: TI BA-35: finding account balance after regular deposits Read more »
The tutor shows how to use the Texas Instruments BA-35 to find the interest rate of a loan. Example: Suppose a loan is made for $750. Twenty months later, it is repaid with a lump sum of $880. What is …
The tutor tells about the arrow button on some calculators. Not all, but some, calculators, have an arrow button. It might look like ⟵ or ▸ or something similar. Where I’ve seen it, it’s a backspace key. The Windows 7 …
Calculator use: the arrow button (backspace key) Read more »
The tutor tells how to change the batteries for the Sharp el-520w, el-531w, and el-w535. Here are the cell requirements: el-520w: two LR44 cells el-531w: two LR44 cells el-w535: one LR44 cell Flipping any of the three models over, you’ll …
Calculators: changing the cells for the Sharp el-520w, el-531w, el-w535 Read more »