In a store window, there was a box of berries having a total weight of $200$ kg. The berries were $99\%$ moisture, by weight. After two days in the sun, the moisture content of the berries was only $98\%$, by weight. What was the total weight of the berries after two days, in kg?

Really need on these. i have no idea what to do

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

What statement is true? 2x^2-9x+2=-1