Why is an approximatly sign important in math?

What is the solution of log2  (3x  -  7)  =  3? 4 5

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Aflagpole broke in a storm. it was originally 8 1 81 feet tall. 2 8 28 feet are still sticking straight out of the ground, where it snapped, but the remaining piece has hinged over and touches the ground some distance away. how far away is the end of the pole from the base of the pole along the ground?