Which mistake did columbus make in the expedition that led him to the americas?
a.
he miscalculated the size of the earth and thought he had reached asia.
b.
he thought the language of the people he met was chinese and didn't realize he was in the americas.
c.
he did not bring enough supplies, so he had to stop in the americas instead of going all the way to asia.
d.
he did not realize how bad storms could be and got so far off course that he reached the americas instead of asia.

The avenues in a particular city run north to south and are numbered consecutively with 1st avenue at the western border of the city. the streets in the city run east to west and are numbered consecutively with 1st street at the southern border of the city. for a festival, the city is not allowing cars to park in a rectangular region bordered by 5th avenue to the west. 9th avenue to the east, 4th street to the south, and 6th street to the north. if x is the avenue number and yis the street number, which of the following systems describes the region in which cars are not allowed to park? 5th ave 9th ave