Estimate how many 12-inch rulers will be the same length as a window

Ineed i been stuck on this question since yesterday

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

During the election for class president, 40% of the students voted for kellen, and 60% of the students voted for robbie. 500 students voted in total. how many more students voted for robbie than for kellen? answer with work : )