mavii

By 1976, a four-function calculator cost only a few dollars. In 1972, 5 million calculators were sold in the US and within ten years there were more calculators in the US than people. Why had the ...

We like mechanical calculators like slide rules ... As the name implies, the derivimeter finds the derivative of a function. To do that, you have to plot the function on a piece of paper that ...

Excel's AGGREGATE function lets you perform calculations whilst ignoring hidden rows, errors, or other functions that appear in the data. It's similar to the SUBTOTAL function but provides more calculation options and gives you more control over what you want to exclude from the calculation.