29.jacob received the following scores on his last five science tests. 81, 73, 80, 94, 97, what is the range of jacob's scores for these five science tests?
A.16
B.24
C.81
D.85
what is the answer?

30. solve the standard deviatation of the scores 5, 4, 3, 6, and 2.
A.1
B.1.4
C.3
D.3.5
what is the answer?​