20 pts the table shows the heights of students in a group.

student height (in inches)
a 49
b 48
c 41
d 45
e 47

what is the mean height of the students in the group?
41 inches
43 inches
46 inches
49 inches

Aline passes through the point (–7, 5) and has a slope of 1/2 which is another point that the line passes through?

The figure shows triangle def and line segment bc, which is parallel to ef: triangle def has a point b on side de and point c on side df. the line bc is parallel to the line ef. part a: is triangle def similar to triangle dbc? explain using what you know about triangle similarity. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap

The graph shows the decibel measure for sounds depending on how many times as intense they are as the threshold of sound. noise in a quiet room is 500 times as intense as the threshold of sound. what is the decibel measurement for the quiet room? 20 decibels28 decibels200 decibels280 decibels