Tim spent $69 on some CDs and DVDs. Each CD cost $1.20
and each DVD cost $1.80. If Tim bought 25 DVDs, how many
CDs did he buy?

Acertain standardized? test's math scores have a? bell-shaped distribution with a mean of 520 and a standard deviation of 105. complete parts? (a) through? (c)

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

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.