The average diameter of 100 sand dollars that make up a collection is 3.50 centimeters with a standard deviation of 0.80 centimeters. If 25 sand dollars are chosen at random from the collection without replacement, find the probability that the average diameter of those sand dollars is less than 3.45 centimeters. Assume that the variable is normally distributed. Adjust for "without replacement." 0.6154
0.8200
0.3257
0.3598

Ihonestly don’t understand this at all

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp

What is the image of c for a 90° counterclockwise rotation about a? (3, 7) (-1, 3) (7, 3)