What’s the property name for ( 1 + 2 ) + 3 = 1 + ( 2 + 3 ) (PLEASE, IM OFFERING KIND OF A LOT OF POINTS!! PLSSS, AND IF YOU PUT A WRONG ANSWER THATS NOT A WORD, THEN IM REPORTING U FOR STEALING MY POINTS. thank you. :) )

The inside wheels of a car traveling on a circular path are rotating half as fast as the outside wheels. the front two wheels are six feet apart. what is the number of feet in the path traced by the inside front wheel in one trip around the circle? express your answer in the form "k \pi", where k is an integer.

Afarm that has 4 x 10^2 acres has 1.2 x 10^5 cattle. what is the average number of cattle per acre? write the answer in scientific notation. answere asap

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup