What challenges did Washington face during his presidency (both domestic and foreign)?

How does the pyramid of giza include art, science, math, or a need for infrastructure?

What was the difference between bombing military targets in the united kingdom, and bombing the city of london? a. bombing a city kills lots of innocent civilians, bombing a military target doesn't b. bombing military targets didn't force the u.k. to surrender, but bombing london did c. military targets were bombed by japan, while london was bombed by the nazis d. london was bombed before the u.s. entered the war; military targets were bombed afterward

Who introduced arabic numerals to italy, which make bookkeeping possible? a. brunelleschi b. cosimo de medici c. fibonacci d. gregory xi e. giovanni de bicci de medici