b is the answer to the question states
x= 90 degrees
this is not a function because the 2 is used twice
C. 78 cm
The mean of any given data set is calculated as sum of all data set divided by the number of data set given.
The data set for the height of Bella's corn given, is 81, 88, 69, 65, 87
Mean height of Bella's corn =