Answer:
I’m assuming the x3 is x to the power of 3! If so, then I believe the answer is
(-∞, ∞)
Explanation:
I attached a picture for what an x^3 graph looks like! Range refers to the y values of a graph starting from the lowest point, which in this case would be negative infinity (as it goes down.... forever), to the highest point (positive infinity, as it goes up forever)
I hope this helped! Sorry if this was a little confusing
Answer:
Railroads used the iron to build railroad tracks but iron was weak and also dangerous. Soon people then realized that steel was a better material for tracks because it was able to hold more weight which then allowed heavier cargo. Railroads also transported mineral needed to forge steel.
Explanation:
Because they were running low on supplies and other goods were missing so they could survive