Which expression is equivalent to 880 • (10- 1/2)?

Can anyone me with 32,33,36,37,and 40.

The median of a data set is the measure of center that is found by adding the data values and dividing the total by the number of data values that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)