If the mean of a test is 80 and the standard deviation is 4, how many students scored above
an 80?
50%
68%
34%
95%
which is the right answer?

1. 3

2. 4

3. 1

hope this ! have a great day.

-wfz

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.