if the r value or correlation of a data set is .908 what is the coefficient of determination to three decimal places

Can someone me with this problem i don't understand i need

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 volume of a sphere is increased by 6%. calculate the corresponding percentage increased in it area.