Why are floods in urban particulary dangerous

Aschool principal ordered 1,000 pencils. he gave an equal number to each of 7 teachers untill had given out as many as possibe. how many pencils were left?

In 1200 bce, the egyptian empire was declining as the civilization was beginning in mesoamerica. a. maya b. oaxaca c. olmec d. teotihuacan

All of the following are reasons why deserts extremely susceptible to wind erosion except a. they lack major root systems b. they contain thin, dry soil c. they have very few plants and trees d. they are extremely hot and lack water