Suppose the tree diagram below represents all the students in a high school
and that one of these students were chosen at random. If the student is
known to be a girl, what is the probability that the student is right-handed?
Left-
handed
50
Boys
200
150
Right-
handed
Left-
handed
50
Girls
300
250
Right-
handed
O A.
LICO
1
B.
C.
D.

The magnitude, m, of an earthquake is defined to be m=log l/s, where i is the intensity of the earthquake (measured by the amplitude of the seismograph wave) and s is the intensity of a “standard” earthquake, which is barely detectable. what is the magnitude of an earthquake that is 1,000 times more intense than a standard earthquake? use a calculator. round your answer to the nearest tenth.

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=