Question

multiple - choice question
why did blaise pascal invent the mechanical calculator?
to help his dad with some tricky math
make it easier for people to collect taxes
because carrying around an abacus was annoying

Explanation:

Blaise Pascal invented the mechanical calculator, called the Pascaline, to help his father, who was a tax - collector, with tax calculations. This made it easier for people to collect taxes. It was not mainly to help with tricky math in a general sense or due to annoyance with carrying an abacus.

Answer:

make it easier for people to collect taxes