Why did the Mongols repeatedly fail to conquer the Sung dynasty before Kublai Khan’s conquest?

A. The Sung army had trebuchets.
B. The Sung army had a blockade.
C. The Sung army had battering rams.
D. The Sung army had greater numbers.

Dr. robbins wants to know if there are different opinions regarding the value of public school education between native americans who have at least one relative who attended indian boarding school and native americans who have no family experience with indian boarding school. dr. robbins contacts 35 native american participants in each group. he wants each group to include younger as well as older adults, and a mix of male and female participants. he asks each person to complete a survey about their attitudes toward public education. the design of this study is:

Science cannot describe things that a.) are beyond imagination, experience, or human ability b.) cannot be observed, measured, or tested c.) have not been conclusively proven d.) occur without being seen, heard, or felt

Look at the table below showing an example of a checkbook ledger. according to the table, what is omar’s bank balance? $761.25 $810.30 $814.75 $1,186.25