What's the recursive and explicit formula for 0.125,0.75,4.5,27 ?

Need ! discuss how to convert the standard form of the equation of a circle to the general form. 50 points

Li buys supplies so he can make and sell key chains. he begins to make a profit only after he sells 4 key chains. what point on the graph makes the most sense in this situation?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?