Answer:
I'd probably say monolithic domes for 4. They learned how to make a really strong large dome structure that could support a lot of its own weight. I'm not sure for 3 but maybe arches and columns.
Explanation:
125% of 12.8 is 16. x= 125% (12.8/x = 100/125) (12.8/x) *x and (100/125) * x (multiply both sides by x) 12.8=0.8*x (divide both sides by 0.8 to get x) 16=x so the answer is 16.
It is C. The Secretary of State William Seward argued that the U.S. should buy Alaska because U.S. wants expand, and Alaska had valuable resources.
